Page 1
Form No. 3364-608 Rev A
MH-400 Material Delivery Unit
Model No. 44930--Serial No. 310000001 and Up
Model No. 44931--Serial No. 310000001 and Up
Model No. 44933--Serial No. 310000001 and Up
Model No. 44934--Serial No. 310000001 and Up
Model No. 44937
Model No. 44938
Setup Manual
Register your product at www.Toro.com
Original Instructions (EN)
Page 2
Page 3
Table of Contents
Introduction........................................................................................................................1
Setup Instructions.............................................................................................................2
Message Boxes .........................................................................................................1
How to Set Up the MH-400 Base...............................................................................2
How to Set Up the Option Caddy (1).........................................................................5
How to Set Up the Option Caddy (2).........................................................................6
How to Set Up the Twin Spinner................................................................................6
How to Set Up the Cross Conveyor...........................................................................8
How to Set Up the Swivel Kit.....................................................................................8
How to Set Up the MH Processor..............................................................................9
How to Set Up the Hydraulic Power Pack ...............................................................10
How to Install the On/Off Pendant Switch On SH Models.......................................11
How to Install the Wiring for the Tow Vehicle..........................................................19
SH Models......................................................................................................19
EH Models......................................................................................................19
How to Install the EH Control Pendant on Tow Vehicle or Swing Arm....................20
How to Install the Electric Brakes............................................................................21
Four Wheel Brake Kit Installation Procedure...........................................................23
How to Install the Brake Wiring................................................................................26
How to Wire the 7-Prong Harness.................................................................27
Two Wheel Brake Kit Installation Procedure (Outer Brakes) ..................................28
Two Wheel Brake Kit Installation Procedure (Inner Brakes)...................................29
How to Install Tow Vehicle Brake Components.............................................30
How to Synchronize the Electric Brakes........................................................31
How to Install the Light Kit.......................................................................................35
Maintenance Instructions ...............................................................................................42
How to Change Tires...............................................................................................42
How to Change an Outside Tire.....................................................................42
How to Change an Inside Tire .......................................................................42
How to Change the MH-400 Conveyor Belt ............................................................42
How to Remove the Belt ................................................................................42
How to Install the Belt ....................................................................................44
Figures
Figure 1: Remove hitch from shipping position .........................................................2
Figure 2: Bolt hitch to frame.......................................................................................2
Figure 3: Remove bolts from weight case mounting bracket ....................................2
Figure 4: Install option attachment clamps................................................................3
Figure 5: Fill weight case...........................................................................................3
Figure 6: Removing Option Caddy Legs ...................................................................3
Figure 7: Remove the rear gate.................................................................................3
Figure 8: Remove bolts and nuts from rear gate.......................................................4
Figure 9: MH-400 tipped backward............................................................................4
Figure 10: Removal of shipping nuts.........................................................................4
Figure 11: Plug in on/off pendant switch on SH Models............................................4
Figure 12: Install legs on option caddy......................................................................5
Table of Contents Page i
Page 4
Figure 13: Remove lift fork stop plates......................................................................5
Figure 14: Install forks onto the slide plate................................................................5
Figure 15: Twin Spinner handle openings.................................................................6
Figure 16: Install Twin Spinner handles....................................................................6
Figure 17: Hopper front guard...................................................................................6
Figure 18: Install hopper front guard.........................................................................7
Figure 19: Twin Spinner option, side view ................................................................7
Figure 20: Install bolts and tighten set screws..........................................................8
Figure 21: Cross conveyor storage stands ...............................................................8
Figure 22: Cross conveyer handles ..........................................................................8
Figure 23: MH Processor in shipping crate............................................................... 9
Figure 24: Processor stand.......................................................................................9
Figure 25: Install hydraulic power pack...................................................................10
Figure 26: Remove hydraulic valve cover and hydraulic guard.............................11
Figure 27: Re-install fender guard with hydraulic valve bank .................................11
Figure 28: Remove hydraulic line clamps and hardware........................................12
Figure 29: Remove and discard far hydraulic hose ................................................12
Figure30: Remove hydraulic fittings........................................................................12
Figure 31 Install connector fitting to inside valve port.............................................12
Figure 32: Install tee fitting to outer valve port........................................................13
Figure 33: Re-install hose to side of tee fitting........................................................13
Figure 34: Install end of Item 8 hose to open hard line...........................................13
Figure 35: Re-install hydraulic line clamps..............................................................13
Figure 36: Install Item 6 hose and fitting end to point B.........................................14
Figure 37: Install Item 7 hose and fitting ends to point A and B..............................14
Figure 38: Remove hydraulic hose clamp...............................................................14
Figure 39: Space and attach grey wiring harness...................................................14
Figure 40: Slide sheath to hydraulic hose attachment; attach hydraulic hoses......15
Figure 41: Pull hoses straight and tighten...............................................................15
Figure 42: Attach mounting bracket for electric socket..........................................15
Figure 43: Wiring Schematic For On/Off Pendant Switch On SH Models..............17
Figure 44: Hydraulic Assembly For On/Off Pendant Switch On SH Models...........18
Figure 45: Attach SH Battery Harness to Solenoid Harness ..................................19
Figure 46: Plug Details............................................................................................19
Figure 47: Attach SH Battery Harness to Solenoid Harness ..................................19
Figure 48: EH Control Pendant Mount....................................................................20
Figure 49: EH Control Pendant Mount....................................................................20
Figure 50: EH Control Pendant Mount Backing Plate.............................................20
Figure 51: Brake shoe assemblies, left side/right side............................................21
Figure 52: Install brake kit.......................................................................................22
Figure 53: Raise and support the MH-400..............................................................23
Figure 54: MH-400 with tires raised in air ...............................................................23
Figure 55: Flip tire and axle assemblies on end......................................................23
Figure 56: Remove hub assembly ..........................................................................24
Figure 57: Mount hub assembly onto drum.............................................................24
Figure 58: Install dust cover onto axle ....................................................................24
Figure 59: Adjust wheel bearings............................................................................25
Figure 60: Prepare 2-prong plug.............................................................................25
Figure 61: Install plug mounting bracket on front....................................................26
Figure 62: Run wires for left side up and under pivot point of MH-400...................26
Figure 63: Run wire along hydraulic hoses to 7-prong plug...................................27
Figure 64: Brake controller (example).....................................................................30
Figure 65: Install brake controller on tow vehicle....................................................30
Page ii Table of Contents
Page 5
Figure 66: Connect wiring harness to electrical plug...............................................32
Figure 67: Install brake wiring..................................................................................33
Figure 68: Electric brake wiring schematic..............................................................34
Figure 69: Position front side yellow marker light....................................................35
Figure 70: Remove bolt for rear taillight bracket......................................................35
Figure 71: Install rear taillight bracket......................................................................35
Figure 72: Drill holes on side hopper wall................................................................36
Figure 73: Drill holes on lip of front panel................................................................36
Figure 74: Attach connector bracket........................................................................36
Figure 75: Wire front marker light............................................................................36
Figure 76: Wire rear taillight.....................................................................................37
Figure 77: Wire side marker light.............................................................................37
Figure 78: Connect ground wire to rear taillights.....................................................37
Figure 79: Light kit wiring assembly.........................................................................39
Figure 80: Light kit wiring schematic........................................................................40
Figure 81: Light kit wiring harness assembly...........................................................41
Figure 82: Remove the option attachment brackets................................................43
Figure 83: Secure and remove the belt cartridge....................................................43
Figure 84: Lift out the belt cartridge.........................................................................43
Table of Contents Page iii
Page 6
Page 7
Introduction
Read this Setup Manual carefully before setting up the
MH-400 Material Delivery Unit. Keep it in an accessible
location.
To get a replacement manual, contact an authorized Toro
distributor.
See the Operator’s Manual for MH-400 specifications,
operating instructions, and safety information.
Throughout this manual, the terms “left” and “right” are
used. When you stand behind the MH-400 facing towards
the rear of it, your left side corresponds to the left side of
the MH-400.
Message Boxes
The Setup Manual contains message boxes that are
labelled Warning and Important. These boxes indicate
potential safety concerns, and operating and servicing
information. Read these message boxes carefully to avoid
injury and equipment damage.
WARNING: Indicates a hazard that may
cause serious injury or death if you do not
follow the recommended precautions.
MPORTANT: Indicates special mechanical or servicing
I
information.
Introduction Page 1
Page 8
Setup Instructions
How to Set Up the MH-400 Base
1. Remove the rear support leg from the shipping
position and place it in the down position.
2. Remove the hitch from the shipping position by
cutting both straps securing the hitch to the fender
(Figure 1). Remove both mounting brackets and
discard.
Figure 2: Bolt hitch to frame
6. Remove the jack assembly from the rear leg. Install
the jack assembly onto the hitch tube, placing the pin
horizontally.
Figure 1: Remove hitch from shipping position
Note – Two people are required to remove the hitch
assembly.
3. Slide the hitch tube tongue into place at the front of
the MH-400. Ensure that the jack mounting bracket
faces out towards the left side.
4. Place one 25 x 162.5 mm (1 x 6½ in) bolt through
the frame and hitch tube, and securely tighten the
nylon locking nut (Figure 2).
5. Place the second 25 x 162.5 mm (1 x 6½ in) bolt
through the top of the frame and down through the
hitch tube. Tighten the nylon locking nut (Figure 2).
Note – Do not place the pin through the top hole of the
jack, or you will not be able to remove the pin when the
weight case is secured to the hitch.
7. Remove the weights from the weight case.
8. Remove the 12.5 x 137.5 mm (½ x 5½ in) bolts from
the mounting bracket holding the weight case.
Discard the mounting bracket (Figure 3).
Figure 3: Remove bolts from weight case
mounting bracket
Page 2 Setup Instructions
Page 9
9. Remove the two option attachment clamps from
underneath the weight case and install them onto the
rear of the MH-400 (Figure 4).
Figure 4: Install option attachment clamps
10. Install the weight case on the hitch (look for the hitch
installation decal), as far forward on the hitch as
possible.
11. Install the two 12.5 x 137.5 mm (½ x 5½ in) bolts
and nylon locking nuts and tighten.
option caddy legs. Set the option caddy legs aside
for future installation. Please refer to Figure 6 below.
Figure 6: Removing Option Caddy Legs
Note – Two people are required for the next step.
14. Remove the rear gate from the front of the MH-400
by lifting one of the corners up and out (Figure 7).
12. Fill the weight case with the weights and install the
safety bar and safety pin (Figure 5).
Figure 5: Fill weight case
13. Remove option caddy legs from rear cross member.
Remove the 12.5 x 127 mm (¼ x 5 in) bolts, nuts,
washers, and strapping before attempting to remove
Figure 7: Remove the rear gate
15. Remove both 7.8 x 50 mm (5/16 x 2 in) bolts and
nylon locking nuts (Figure 8).
Setup Instructions Page 3
Page 10
Figure 8: Remove bolts and nuts from rear gate
16. Install the rear gate into position at the rear of the
MH-400 (Figure 8).
17. Install both 7.8 x 50 mm (5/16 x 2 in) bolts and
nylon locking nuts back into the rear gate assembly.
18. Remove the protective wrapping from the the mirror
assembly and adjust it into position.
19. Tip the MH-400 back. Refer to Figure 9.
Figure 10: Removal of shipping nuts
21. Remove two 7.8 mm (5/16 in) nuts from the option
caddy shipping brackets opposite to the wheel side of
the option caddy as shown above in Figure 10.
Before removing the second nut, ensure that the
option caddy weight is supported. Set nuts and
washers aside.
22. Carefully lower the option caddy to the ground and
set aside for future installation. Remove the shipping
brackets from the option caddy and set aside.
23. Tip the MH-400 to its upright position.
24. On SH models plug the on/off pendant switch (4-
prong end) into the socket at the front left corner of
the MH-400 (Figure 11).
Figure 9: MH-400 tipped backward
20. Remove two 7.8 mm (5/16 in) nuts from the option
caddy shipping brackets on the side of the option
caddy that contains the wheels. The option caddy
will drop approximately 25 mm (1 in) and the wheels
will rest on the ground. Set nuts and washers aside.
See Figure 10.
Figure 11: Plug in on/off pendant switch on SH
Models
Page 4 Setup Instructions
Page 11
The tow vehicle hydraulics are required to run the on/off
pendant switch on SH Models.
25. Take the universal power feed wire (3.9 m [13 ft]
length) and attach the alligator clips to the tow
vehicle’s battery.
26. Run the wire to the back of the tow vehicle and
connect it to the wire located with the pressure and
return hydraulic hoses.
27. Test the operation of the MH-400. Ensure that there
are no hydraulic leaks. Make any adjustments
required.
28. Attach and test each of the options to ensure proper
operation (refer to the Operator’s Manual).
29. If MH-400 is equipped with a brake kit, please refer
to the setup manual for the set up procedure.
How to Set Up the Option Caddy (1)
The option caddy is designed for one person to easily lift,
transport, and mount the Twin Spinner, swivel kit, or
cross conveyor onto the MH-400.
3. Remove the left and right lift fork stop plates
(Figure 13).
Figure 13: Remove lift fork stop plates
4. Install both forks onto the slide plate (Figure 14).
1. Remove all wooden shipping blocks and banding
before proceeding with installation.
2. Install the left and right side legs into the slots using
the supplied 12.5 x 87.5 mm (½ x 3½ in) bolts,
washers (top and bottom) and nylon locking nuts
(Figure 12).
Figure 12: Install legs on option caddy
Figure 14: Install forks onto the slide plate
5. Re-install the lift fork stop plates using:
• 7.8 x 31.25 mm (5/16 x 1¼ in) GR8 bolts
• 7.8 mm (5/16 in) GR8 flat washers
• 7.8 mm (5/16 in) GR8 nylon locking nuts
6. Check that the tire pressure on all tires is
206 kPa (30 psi) maximum.
Setup Instructions Page 5
Page 12
How to Set Up the Option Caddy (2)
The option caddy is designed for one person to easily lift,
transport, and mount the cross conveyor, with or without
the swivel kit, onto the MH-400.
1. Remove all wooden shipping blocks and banding
before proceeding with installation.
2. Install the handle into the frame and secure using the
provided pins (2).
3. Check that the tire pressure on all tires is
206 kPa (30 psi) maximum.
How to Set Up the Twin Spinner
1. Remove the rubber scraper and retainer bar from
their shipping position. Install them (Figures 15 and
16) using the supplied 7.8 x 25 mm (5/16 x 1 in)
GR8 bolts, washers, and nylon locking nuts. Ensure
the vertical portion of the rubber scraper is on the
same side as the hopper opening (Figures 15 and 16).
2. Insert the handles into the handle openings
(Figure 15).
Figure 16: Install Twin Spinner handles
4. Remove the hopper front guard from its shipping
position.
5. Turn it around and install it using the supplied
6.25 x 15.6 mm (¼ x ⅝ in) GR8 bolts, washers, and
nylon locking nuts (Figures 17 and 18).
6. Install the Twin Spinner into the quick-attach
brackets at the rear of the MH-400 (see How to
Mount the Options in the Operator’s Manual).
Figure 15: Twin Spinner handle openings
3. Securely fasten the handles with washers and nuts
(Figure 16).
Page 6 Setup Instructions
Figure 17: Hopper front guard
Page 13
Figure 18: Install hopper front guard
Figure 19: Twin Spinner option, side view
A. Option control valve
B. Hose connections
C. Quick-attach brackets
Setup Instructions Page 7
D. Twin Spinner
E. Hydraulic hoses
Page 14
How to Set Up the Cross Conveyor
1. Install the front deflector shield, with the rubber
hanging down, to the inside rail of the cross
conveyor (on the motor end), using two 6.35 x
25 mm (¼ x 1 in) bolts and nylon locking nuts.
These will be found loosely in place where the
deflector shield is to be mounted. Place the flat
washers between the side rail of the cross conveyor
and the front deflector shield bar. Tighten only
enough so that the deflector shield can still pivot.
2. Unbolt the guard and the mounting bracket from the
hydraulic motor and keep all the bolts and washers to
reinstall.
3. Slide the mounting bracket into position on the cross
conveyor so that the side rail fits through the cut outs
on the bracket. Place the shaft from the motor
through the hole on the mounting bracket and into
the coupler. Reinstall the 9.53 x 25 mm (3/8 x 1 in)
bolts, lock washers and flat washers through the
mounting bracket and into the hydraulic motor as
they were shipped, keeping the hydraulic ports and
hoses horizontal to the cross conveyor (Figure 20).
4. Tighten the set screws on the coupler to the hydraulic
motor shaft.
bolts, flat washers and nylon locking nuts (Figure
21).
7. Install the conveyor handles to the unit. Attach the
handles below the side rails, using the 6.35 x 19mm
(¼ x ¾ in) bolts, flat washers and nylon locking nuts
(Figure 22).
Figure 21: Cross conveyor storage stands
Figure 22: Cross conveyer handles
How to Set Up the Swivel Kit
8. Mount the rubber scraper on top of the swivel kit.
Figure 20: Install bolts and tighten set screws
5. Reinstall the guard onto the motor bracket using the
7.94 x 15.88 mm (5/16 x 5/8 in) bolt, lock washer
and flat washer supplied.
6. Assemble the two storage stands (the base and cross
members) using the 6.35 x 44.45 mm (1/4 x 1 ¾ in)
Page 8 Setup Instructions
Ensure the vertical portion of the rubber scraper is on
the same side as the hopper opening (same
orientation as the twin spinner rubber scraper, see
Figure 15).
9. Mount the retainer bar across the rubber scraper, and
tighten the five 7.8 mm (5/16 in) bolts with the nylon
locking nuts.
Page 15
How to Set Up the MH Processor
1. Remove all wooden shipping blocks and banding
before proceeding with set up. Also remove the loose
stand components and set them aside.
2. The hopper is shipped inverted on the conveyor.
Install the hopper onto the conveyor so that the
opening of the hopper is facing upwards and is at a
45 degree angle. Using six 3/8” x 1” (9.5 x 25 mm)
bolts, six nylon locking nuts and twelve washers,
fasten the base of the hopper to the conveyor.
Figure 23: MH Processor in shipping crate
3. Install the conveyor gate handle to the hopper using
the 3/8” x 1-1/2” (9.5 x 38 mm) bolt, nylon locking
nut and 3 washers, locating one washer on either side
and one between the handle and hopper.
4. Refer to steps 2 to 5 of “How to set up the Cross
Conveyor” to assemble the motor and motor guard.
5. Assemble the processor stand.
Figure 24: Processor stand
a. Install the bottom tubes to the tabs of
the footer using four 3/8” x 2” (9.5 x
51mm) bolts and nylon locking with
and washers.
b. Install the lower support using two 3/8”
x 2-3/4” (9.5 x 70 mm) bolts and nylon
locking with and washers.
c. Install the upright brace to the left and
right uprights using four 3/8” x 2” (9.5
x 51mm) bolts and nylon locking with
and washers.
d. Install the bottom of the uprights to the
bottom tubes using two 3/8” x 2-3/4”
(9.5 x 70 mm) bolts and nylon locking
with and washers.
e. Finally, install the flat bar braces
between the uprights and bottom tubes
using a total of four 3/8” x 2” (9.5 x
51mm) bolts and nylon locking with
and washers.
Setup Instructions Page 9
Page 16
How to Set Up the Hydraulic Power Pack
Attach the power pack to the front hitch of the MH-400
using the parts supplied (Figure 25).
Figure 25: Install hydraulic power pack
A. Connect to tow vehicle PTO (power take-off unit)
B. PTO shaft
C. Set screw on PTO shaft hub
D. Power pack
1. Support the hitch off the ground, as level as possible
without using the jack for support, or connect it to
the tow vehicle. Remove the jack assembly from the
hitch.
2. Install the power pack on the hitch straddling the
jack mount. Ensure that the output port of the pump
faces forward.
3. Center the hitch jack mount between both edges of
the mounting plate for the PTO (power take-off unit).
E. Tank mount
F. PTO jack mount
G. MH-400 jack mount
H. MH-400 hitch
4. Install the four 12.5 x 137.5 mm (½ x 5½ in) bolts
with nylon locking nuts and washers. Tighten the
bolts to 27.6 kg/m (200 ft-lb).
5. Install the PTO shaft to the end of the pump shaft
and tighten both set screws.
6. Attach the jack to the jack mount on the side of the
power pack.
7. Attach the hitch to the tow vehicle.
8. Install the PTO shaft to the tow vehicle. Ensure that
the PTO shafts overlap each other by one-third of
Page 10 Setup Instructions
Page 17
their total length. You may have to move the power
pack forward or cut the PTO shaft.
9. Install the MH-400 pressure and return hoses to the
PTO. The female quick coupler closest to the control
lever is the pressure port. The return hose has an
inline one way check valve.
10. Fill the hydraulic PTO tank with a recommended
hydraulic fluid (see the hydraulic fluid chart in the
Operator’s Manual).
11. Test the PTO power pack to ensure proper operation.
12. After testing, top up the PTO hydraulic fluid if
necessary.
WARNING: Do not operate the hydraulic
power pack when making a sharp turn.
Always disengage the power pack first.
How to Install the On/Off Pendant
Switch On SH Models
1. Remove the hydraulic valve cover and hydraulic
guard from the fender and the fender guard.
(Figure 26) With a pair of side cutters, ensure that
the tie straps are cut off from the lift cylinder control.
2. Remove the fender guard from the fender by
removing the three carriage bolts, which can be
accessed in the wheel well.
3. Lay the fender guard on the bench with the angle
facing up.
4. Measure, mark, center punch, and drill two holes
(Figure 42 inset: L.H. Fender Panel).
5. Attach the solenoid to the fender panel with three
6.25 mm (¼ in) washers between the fender panel
and the solenoid (to act as spacers).
Note – Ensure that the black solenoids do not touch the
fender. Also ensure that the rubber clamp holding the
wiring is attached to the left mounting bolt.
6. Re-install the fender guard onto the fender, with the
hydraulic valve bank attached, using the three
original carriage bolts and nylon locking nuts
(Figure 27).
Figure 27: Re-install fender guard with hydraulic
valve bank
Lift cylinder
Figure 26: Remove hydraulic valve cover
and hydraulic guard
Setup Instructions Page 11
Page 18
7. Remove both hydraulic line clamps and hardware
from the fender (Figure 28).
Figure 28: Remove hydraulic line clamps and
hardware
8. Remove and discard the hydraulic hose that is
farthest away from the valve control lever on the first
hydraulic control valve (Figure 29, top arrow).
10. Remove the two hydraulic fittings (90-degree) from
the top of the hydraulic control valve (Figure 30).
Figure30: Remove hydraulic fittings
Note – When installing hydraulic hoses or fittings, use
Loctite #545 (sealant) and Loctite #7471 (primer).
11. Install the connector fitting (½ mjic – ½ mpt) to the
inside valve port (Figure 31).
Figure 29: Remove and discard far hydraulic hose
Figure 31 Install connector fitting to inside valve port
9. Remove the hydraulic hose closest to the valve lever
and move out of the way (Figure 27, bottom arrow).
This hose will be re-attached later.
Page 12 Setup Instructions
Page 19
12. Install the tee fitting (½ mjic – ½ mjic – ½ mpt) to
the outer valve port. Ensure that the angle of the tee
fitting is the same as the angle of the 90-degree
fittings that you removed (Figure 32).
Figure 32: Install tee fitting to outer valve port
13. Re-install the hose that was disconnected in Step 9 to
the side of the tee fitting (Figure 33).
15. Install the opposite end of the Item 8 hose to the
open hard line (Figure 34).
Figure 34: Install end of Item 8 hose to open hard line
16. Position both hoses side by side and re-install the
hydraulic line clamps on the side of the MH-400
(Figure 35). You may need to loosen the hose ends to
properly fit the clamps.
Figure 33: Re-install hose to side of tee fitting
14. Install the Item 8 hose to the hydraulic valve bank
port #4 (Figure 44).
Figure 35: Re-install hydraulic line clamps
17. Install the Item 6 hose and the 90-degree fitting end
to point B of the hydraulic control valve (Figure 36,
right arrow, and Figure 44).
Setup Instructions Page 13
Page 20
18. Attach the opposite end to the valve solenoid port #1
(Figure 36, left arrow, and Figure 44).
Figure 36: Install Item 6 hose and fitting end
to point B
19. Install the Item 7 hose and 90-degree fitting end to
point A of the hydraulic control valve (Figure 37, top
arrow, and Figure 44).
23. Remove the hydraulic hose clamp at the front left
corner of the MH-400. Discard the 6.25 cm (2½ in)
bolt only (Figure 38).
Figure 38: Remove hydraulic hose clamp
24. Route the grey wiring from the hydraulic valve
solenoid along the return hose (the one with the oneway check valve).
20. Attach the opposite end to the valve solenoid port #2
(Figure 37, bottom arrow, and Figure 44).
Figure 37: Install Item 7 hose and fitting ends to point
A and B
21. Tighten the hoses so they will not come in contact
with the other hoses.
22. Re-install the hydraulic valve cover to the fender and
the fender guard.
25. Using cable ties, evenly space and attach the wiring
harness from the hydraulic valve solenoid up to the
first wiring harness juncture (Figure 39).
Figure 39: Space and attach grey wiring harness
26. Lay the hose sheath out on the bench. Fold both ends
by 5 cm (2 in). (Folding both ends of the hose sheath
will prevent it from fraying.)
Page 14 Setup Instructions
Page 21
27. On one end, cut a hole through the sheath 18.75 mm
(¾ in) away from the end (ensure that you cut
through both sides). This will be the front end of the
sheathing.
28. On the opposite end, cut a hole through the sheath
37.5 mm (1½ in) away from the end. This will be the
rear end of the sheathing.
29. On the front end, take five or six large paper clips
and slide them over the end. These will help keep the
fold in place when you slide through the hydraulic
hose and wiring (Figure 43).
30. Slide the grey solenoid wiring harness and both
pressure and return hoses through the rear end of the
black protective hose sheath.
31. Slide the sheath up to the point where the hydraulic
hoses are attached to the front of the MH-400 with
the hydraulic line clamps (Figure 40).
32. Using the supplied 6.25 x 75 mm (¼ x 3 in) bolt,
attach the hydraulic hoses and the wiring harness to
the existing hydraulic line clamp mounting point. Do
not crush the wiring harness (Figure 40).
hose sheathing. Tighten. Do not crush the wiring
harness (Figure 41).
Figure 41: Pull hoses straight and tighten
35. Attach the mounting bracket for the electric socket
on the front left bottom lip of the MH-400. The
mounting bracket should measure (from the center of
the bracket) 16.25 cm (6½ in) away from the left
front corner tube.
Figure 40: Slide sheath to hydraulic hose attachment;
attach hydraulic hoses
33. Pull both the hoses and the grey solenoid wiring
harness straight. Ensure that the hose sheath is not
bunching.
34. Install the 9.4 x 68.75 mm (⅜ x 2¾ in) bolt with two
washers, one nylon locking nut, and two hydraulic
line clamps at the hole you previously cut into the
36. Use a 7 mm (9/32 in) drill bit to drill out holes for
mounting (Figure 42).
Figure 42: Attach mounting bracket for
electric socket
37. Attach the 4-prong socket using 9.375 mm (⅜ in)
bolts, washers, and nuts.
Setup Instructions Page 15
Page 22
38. Take the Item 7 rubber grommet and slide it over the
yellow wiring harness.
39. Attach the yellow wiring harness to the back side of
the 4-prong socket. Follow the wiring schematic in
Figure 41.
40. Slide the rubber grommet up into the back side of the
socket.
Page 16 Setup Instructions
Page 23
Figure 43: Wiring Schematic For On/Off Pendant Switch On SH Models
Setup Instructions Page 17
Page 24
Figure 44: Hydraulic Assembly For On/Off Pendant Switch On SH Models
Page 18 Setup Instructions
Page 25
How to Install the Wiring for the Tow
Vehicle
SH Models
1. Run the battery wiring harness through the tow
vehicle and up to the battery.
2. Connect the white wire to the positive connector and
the black wire to the ground using the clips provided.
3. Attach the SH battery wiring harness to the solenoid
wiring harness coming from the hose sheathing
(Figure 45).
“+V” WIRE
Figure 46: Plug Details
3. Attach the socket bracket to the tow vehicle using the
6.35 x 25.4 mm (¼ x 1 in) hardware provided.
4. Attach the battery wiring harness to the solenoid
wiring harness coming from the hose sheathing
(Figure 47).
“0V” WIRE
Figure 45: Attach SH Battery Harness to Solenoid
Harness
4. Ensure that all the hose connections and wire
harnesses are installed correctly and tightened.
I
MPORTANT: Always remove the on/off pendant
switch cord or disconnect the power supply wire
when the MH-400 and tow vehicle are not in use.
Otherwise, the tow vehicle battery will lose power.
5. Verify operation of the MH-400. Ensure that there
are no hydraulic leaks.
EH Models
1. Install the MH 400 EH electrical connection kit
wiring harness through the tow vehicle and up to the
battery.
2. Connect the “+ V” wire to the positive terminal and
the “0 V” wire to the ground terminal (Figure 44).
Figure 47: Attach SH Battery Harness to Solenoid
Harness
5. Ensure that all the hose connections and wire
harnesses are installed correctly and tightened.
I
MPORTANT: Always remove the control pendant
when the MH-400 and tow vehicle are not in use.
6. Verify operation of the MH-400. Ensure that there
are no hydraulic leaks.
Setup Instructions Page 19
Page 26
How to Install the EH Control Pendant
on Tow Vehicle or Swing Arm
1. Remove the pendant and pendant bracket from the
packaging.
2. Attach the pendant bracket to the pendant. Remove
the two nuts and install the bracket, making sure the
tension knob is on the right side of the pendant
(Figure 48).
Figure 49: EH Control Pendant Mount
Figure 48: EH Control Pendant Mount
3. For Tow Vehicle mounting, determine an appropriate
location for the control pendant mount. Surface
should be flat and solid. For Swing Arm mounting,
install the pendant bracket into the end of the swing
arm.
4. Using the backing plate mark the four mounting
holes.
5. Drill four 8.7mm (11/32”) holes.
6. Attach the mount using the 7.9 x 38.1mm (5/16 x 1
½ in) bolts with the hardware provided (Figures 46
and 47).
Figure 50: EH Control Pendant Mount Backing Plate
Page 20 Setup Instructions
Page 27
How to Install the Electric Brakes
Before installing the electric brakes, remove the
protective LPS coating that is applied at the factory to
protect the drums and the shoe backing plates from
corrosion.
1. Remove all of the brake shoes and brake drums from
the kit and place them in a well-ventilated area.
2. Use an automotive brake cleaner to spray the brake
drums and brake shoes until the protective coating is
completely removed. You may need to spray twice
for best results.
Note: The following procedure covers how to install one
brake shoe assembly onto the MH-400 axle. For a four
wheel brake kit, there are four brake shoe assemblies: two
for the left axle assembly, and two for the right axle
assembly (Figure 52). For a two wheel brake kit, there
are two brake shoe assemblies: one for the left axle
assembly (outside wheel), and one for the right axle
assembly (outside wheel) (Figure 52).
I
MPORTANT: Do not mix up the brake shoe
assemblies (Figure 48). To ensure correct placement
on the axle assembly, check that the 6.25 mm (¼ in)
bolt welded on the bottom of the main axle assembly
faces down, and that the 6.25 mm (¼ in) bolt welded
on the mounting shaft faces the front of the MH-400.
(If you have any doubts or questions, call an
authorized Toro distributor.)
Figure 51: Brake shoe assemblies, left side/right side
Setup Instructions Page 21
Page 28
Figure 52: Install brake kit
A. Suspension chassis
B. Note – The threaded bolt welded to the end of the
walking beam shaft must face towards the front of
the MH-400
C. Existing tire
D. Wheel
E. Dexter brake assembly
F. Walking beam assembly
G. Wheel nuts
H. Walking beam bearing
Page 22 Setup Instructions
Page 29
Four Wheel Brake Kit Installation
Procedure
1. The MH-400 must be stable. Start by carefully
raising and safely supporting the MH-400 off of the
ground, so that the four tires are off of the ground by
about 5 cm (2 in) (Figures 53 and 54).
undo the bolts holding the suspension, while leaving
room to remove the tires and axles from under the
MH-400.
3. Remove the four nuts and bolts that go through the
yellow bearing blocks and hold the axles onto the
suspension on each side.
4. Remove the yellow bearing blocks and set them
aside.
5. Roll out the tire and axle assemblies as a unit (two
tires each) from under the MH-400 (Figure 51).
6. Flip the tire and axle assemblies on end with inner
tire up. Remove the top tire from each assembly
(Figure 55).
Figure 53: Raise and support the MH-400
Figure 54: MH-400 with tires raised in air
2. Loosen the lug nuts on the outside tires, one-half to
three-quarters of the way off. This allows you to
Figure 55: Flip tire and axle assemblies on end
7. Remove the dust cap, cotter pin, bearing tension nut,
and washer.
Setup Instructions Page 23
Page 30
8. Lastly, remove the hub assembly. The spindle and a
fastening plate will be left (Figure 56).
Figure 57: Mount hub assembly onto drum
12. Torque in a crossover pattern (same as a tire) to
13.8 kg/m (100 ft-lb).
Figure 56: Remove hub assembly
9. Check all bearings and races. Replace them if
necessary.
10. Ensure that the hubs are free of moisture and dirt.
Repack components with grease before re-installing.
Note – You must scrape the paint off of the hub and drum
(where they contact each other) to make the drum fit
properly.
11. Mount the inner side of the hub assembly onto the
outside of the drum using six flathead bolts (allen
key style, 12.5 x 31.25 mm [½ x 1½ in]). Thread the
bolts by hand from the inside of the drum before
using an impact tool (Figure 57).
13. Install the dust cover onto the axle, ensuring that the
adjusting hole on the brake shoe is on the bottom
(Figure 58).
Figure 58: Install dust cover onto ax le
14. Install the correct brake shoe with the backing plate
against the dust cover. Ensure that the magnet arm
faces the front of the MH-400 and the magnet is on
the bottom (Figure 38). Remember that the 6.25 mm
(¼ in) bolt welded on the mounting shaft faces the
front of the MH-400.
15. Run the two wires through the back side hole in the
backing plate and through the hole in the dust cover.
Page 24 Setup Instructions
Page 31
16. Install the four 12.5 x 31.25 mm (½ x 1½ in) bolts
from the back side, using the nylon locking nuts on
the inside of the brake shoe assembly. Torque to
15.2 kg-m (110ft-lbs).
Note – Do not use air tools when tightening the backing
plate and shoe assembly.
17. Install the hub and drum assembly onto the spindle.
18. Adjust the wheel bearings (Figure 59).
Follow these steps for both sets of brake shoe
assemblies:
24. Take the white wires (one from each brake shoe
assembly ) and crimp them together into one end of a
shrink connector.
25. Take the red wires (one from each brake shoe
assembly ) and crimp them together into one end of a
shrink connector.
26. Take the 2-prong quick-connect plugs and pull them
apart (Figure 60).
Figure 59: Adjust wheel bearings
19. Install the cotter pin and a new dust cap.
20. Remount the tire. Remember to leave the outside tire
loose for re-installation.
21. Repeat the above steps for the other three tires and
brake shoe assemblies.
22. Torque the inside tire assemblies to 13.8 kg-m
(100 ft-lb) and leave the outer tire assemblies loose
for installation.
23. Set the brakes on the inside tire assemblies to
slightly drag on the drum.
Figure 60: Prepare 2-prong plug
27. Crimp the red male wire plug into one of the shrink
connectors from the brake shoes, and crimp the white
wire plug into the other shrink connector.
28. Heat the shrink connectors with a torch or hot air
dryer until they shrink tight onto the wire.
29. Attach the wiring from the drums to the bottom
6.25 mm (¼ in) bolt with a wire clamp and a
6.25 mm (¼ in) nylon locking nut.
30. Attach the wiring to the front 6.25 mm (¼ in) bolt
with the wire clamp and the 6.25 mm (¼ in) nylon
locking nut.
31. Roll both the axles back under the MH-400. Ensure
that the bolt welded on the mounting shaft faces the
front of the MH-400 and the other bolt on the axle
assembly faces down.
Setup Instructions Page 25
Page 32
Note – The tire with the loose lug nuts must be on the
outside of the MH-400.
32. Line up all the holes and set the yellow block (the
one without the grease nipple) on top of the
mounting shaft.
33. Lower the bolts into the block and lower the MH-400
onto the block.
34. Add the other yellow block (the one with the grease
nipple) to the bottom side. Install the nuts and
tighten.
35. Tighten the outside tires. Torque to 13.8 kg/m
(100 ft-lb).
36. Before lowering the MH-400, set the brakes on the
outside tire assemblies to slightly drag on the drum.
How to Install the Brake Wiring
Install the mounting bracket for the 7-prong electrical
plug onto the front panel beside the hydraulic hoses
(Figure 61).
2. Take the white wire of the same 2-prong plug and
connect it to the white wire of the grey wiring
harness with a shrink connector (this will be the
ground wire).
3. Heat the shrink connectors with a torch or hot air
dryer until they shrink onto the wire.
4. Plug the 2-prong plug into the other 2-prong plug
that you wired into the brake shoes earlier.
5. Run the grey wiring harness to the electrical plug
(Figures 59 and 60). Attach the spiral protection
wrap to the wiring harness to prevent wear.
6. Run the wires for the right side up and under the
pivot point of the MH-400, and along the cross
member to the left side pivot point (Figure 62).
Note – When riveting the wire onto the frame, space the
rivets evenly, and do not space them more than
25 cm (10 in) apart.
Figure 62: Run wires for left side up and under pivot
point of MH-400
Figure 61: Install plug mounting bracket on front
Complete these steps on the right side brake assembly
first.
1. Take the red wire of the 2-prong female plug and
connect it to the black wire of the grey wiring
harness with a shrink connector (this will be the
positive wire).
Page 26 Setup Instructions
Page 33
7. Run the wire along the hydraulic hoses to the
7-prong electrical plug (Figure 63).
Figure 63: Run wire along hydraulic hoses to
7-prong plug
8. Cut the grey wiring harness, leaving enough wire to
connect to the 7-prong electrical plug. Repeat the
above steps for the left side brake assembly.
9. Use tie-straps to hold the wires along the hydraulic
hoses.
How to Wire the 7-Prong Harness
1. Strip off the ends of the two sets of wires—one from
the left brake assembly and one from the right.
2. Connect the black wires together and the white wires
together.
3. Install all the wires through the rubber protective
boot of the 7-prong plugs.
4. Install the rubber boot on the back of the electrical
plug (it protects the wires and keeps the connections
clean).
5. Attach the wires to the 7-prong plug (Figure 66).
6. Place the black wires into the blue port and the white
wires into the white port (black is for power and
white is for ground).
7. Cover all the joints with the white plastic spiral wire
wrap. This helps support the wiring connections.
I
MPORTANT: Solder all connections and bared wire
ends. Use heat shrink connectors on spliced joints.
Setup Instructions Page 27
Page 34
Two Wheel Brake Kit Installation
Procedure (Outer Brakes)
1. The MH-400 must be stable. Start by carefully
raising and safely supporting the MH-400 off the
ground, so that the four tires are off the ground by
about 5 cm (2 in) (Figures 53 and 54).
2. Remove outside wheel on the left and right side of
the unit.
3. Remove the dust cap, cotter pin, bearing tension nut,
and washer.
4. Lastly, remove the hub assembly. The spindle and a
fastening plate will be left (Figure 56).
5. Check all bearings and races. Replace them if
necessary.
6. Ensure that the hubs are free of moisture and dirt.
Repack components with grease before re-installing.
Note – You must scrape the paint off of the hub and drum
(where they contact each other) to make the drum fit
properly.
7. Mount the inner side of the hub assembly onto the
outside of the drum using six flathead bolts (allen
key style, 12.5 x 31.25 mm [½ x 1½ in]). Thread the
bolts by hand from the inside of the drum before
using an impact tool (Figure 57).
8. Torque in a crossover pattern (same as a tire) to
13.8 kg/m (100 ft-lb).
9. Install the dust cover onto the axle, ensuring that the
adjusting hole on the brake shoe is on the bottom
(Figure 55).
10. Install the correct brake shoe with the backing plate
against the dust cover. Ensure that the magnet arm
faces the front of the MH-400 and the magnet is on
the bottom (Figure 49). Remember that the 6.25 mm
(¼ in) bolt welded on the mounting shaft faces the
front of the MH-400.
11. Run the two wires through the back side hole in the
backing plate and through the hole in the dust cover.
the inside of the brake shoe assembly. Torque to
15.2kg-m (110ft-lbs).
Note – Do not use air tools when tightening the backing
plate and shoe assembly.
13. Install the hub and drum assembly onto the spindle.
14. Adjust the wheel bearings as you would for any other
axle assembly (Figure 59).
15. Install the cotter pin and a new dust cap.
16. Remount the tire.
17. Repeat the above steps for the tire and brake
assembly on the other side of the unit.
18. Torque the tire assemblies to 13.8 kg/m (100 ft-lb).
19. Before lowering the MH-400, set the brakes to
slightly drag on the drum.
Follow these steps for both the left and right brake shoe
assemblies:
20. Take the white wire and crimp it into the end of a
shrink connector.
21. Take the red wire and crimp it into the end of a
shrink connector.
22. Take the 2-prong quick-connect plugs and pull them
apart (Figure 60).
23. Crimp the red male wire plug into a shrink connector
from the brake shoe, and crimp the white wire plug
into the other shrink connector.
24. Heat the shrink connectors with a torch or hot air
dryer until they shrink tight onto the wire.
25. Attach the wiring from the drum to the bottom
6.25 mm (¼ in) bolt with a wire clamp and a
6.25 mm (¼ in) nylon locking nut.
26. Attach the wiring to the front 6.25 mm (¼ in) bolt
with the wire clamp and the 6.25 mm (¼ in) nylon
locking nut.
12. Install the four 12.5 x 31.25 mm (½ x 1½ in) bolts
from the back side, using the nylon locking nuts on
Page 28 Setup Instructions
Page 35
Two Wheel Brake Kit Installation
Procedure (Inner Brakes)
1. Follow procedure for four wheel brake kit
installation steps 1-20.
2. Repeat steps 7-20 for other inside tire.
3. Continue with step 22 onwards.
Install brake wiring and 7-prong harness as described in
the previous section.
Setup Instructions Page 29
Page 36
How to Install Tow Vehicle Brake
Components
Follow the instructions on Figures 62 and 65 to install the
brake controller on the tow vehicle.
Figure 61 shows a typical installation for the controller.
Note: For further information about brake controller and
load controller installation, refer to Warner Electric
document #P-1386 819-0129 and 819-0128.
Figure 64: Brake controller (example)
A. Mount the 7-prong plug and
bracket at the rear of the tow
vehicle
B. Mount the load controller in an
accessible location on the dash
or fender
C. Wire to fuse (15A for 4 brakes,
10A for 2 brakes, not provided)
and 12VDC
D. Clamp the foot controller to the
tow vehicle brake pedal,
following the manufacturer
instructions
E. Ground wire to tow vehicle
(Figure 63)
Figure 65: Install brake controller on tow vehicle
Page 30 Setup Instructions
Page 37
How to Synchronize the Electric Brakes
Before operating the MH-400 for the first time, the
electric brakes must be synchronized to the tow vehicle’s
brakes (so that they operate at the same time).
The MH-400 and the tow vehicle will seldom have the
correct amperage flow to the brake magnets to provide
comfortable, safe braking. Changing the load weight, as
well as uneven alternator and battery output, can result in
unstable current flow to the brake magnets.
The electric brake controller provides a modulation
function, which varies the current to the electric brakes
according to the pressure on the brake pedal or the
deceleration of the tow vehicle.
• The brake controller must provide about 2 V to the
braking system when the brake pedal is first
depressed.
• As the brake pressure increases, this should
gradually increase to 12 V.
• If the brake controller jumps quickly to a high
voltage (for example, during a gradual stop), this will
result in harsh, jerky braking and possible wheel
locking.
that the MH-400 brakes are applied at the same time
as the tow vehicle brakes.
To properly synchronize the brakes and achieve smooth
braking, you must burnish the brake drums:
• With the MH-400 connected to the tow vehicle,
conduct a driving test on a dry, paved road free of
sand and gravel.
• Depress the brakes repeatedly, 20 to 30 times. Each
time, decrease your speed by about 20 km/h
(12 mph).
• Next, from a speed of 24 km/h (15 mph), make
several hard stops.
• If the MH-400 brakes lock and slide, decrease the
gain setting on the controller. If they do not slide,
slightly increase the gain setting. Adjust the
controller to the point just before the brakes lock up
and the wheels skid.
• If the controller is applying the MH-400 brakes
before the tow vehicle brakes, adjust the controller so
Setup Instructions Page 31
Page 38
Figure 66: Connect wiring harness to electrical plug
To 7-pole connector
To right side electric brakes
To left side electric brakes
Page 32 Setup Instructions
Page 39
Figure 67: Install brake wiring
A. Detail A G. Drill and rivet clamps to chassis
B. Detail B H. Install clamp to bolts on walking beam assembly
C. Detail C I. Wiring to brakes (Four Wheel Kit Shown)
D. Front view J. 7-prong plug
E. Side view K. Fasten wiring harness to hoses with clamps
F. Bolt 7-prong plug to front of MH-400 L. Connector cable
Setup Instructions Page 33
Page 40
Figure 68: Electric brake wiring schematic
(Four Wheel Brake System Shown, Two Wheel Brake System Contains Only One Left and One Right Brake Assembly)
Page 34 Setup Instructions
Page 41
How to Install the Light Kit
1. Position the yellow marker light for the front side
underneath the safety decal (Figure 69). Measure
50 mm (2 in) in from the front corner tube of the
MH-400 and mark the top left hole.
2. Center punch and drill out the hole with a
5 mm (3/16 in) drill bit.
Figure 70: Remove bolt for rear taillight bracket
9. Using the rear taillight bracket as a template, mark
the second hole and pre-drill it using a
7 mm (9/32 in) drill bit. Then drill it out using a
9mm (11/32 in) drill bit.
Figure 69: Position front side yellow marker light
3. Using the front side marker light as a template, mark
a second hole. Center punch and drill out the hole.
4. Ensure that the holes line up, then drill the last two
holes.
5. Drill two holes into the side of the hopper for the
wiring clamps, using a 5 mm (3/16 in) drill bit.
6. Drill one 11 mm (7/16 in) hole into the front corner
tube.
7. Attach the front marker light bracket to the MH-400
body using the four pop rivets supplied.
8. Remove the one hopper bolt and install the rear
taillight bracket, using a 7.8 x 37.5 mm
(5/16 x 1½ in) bolt (Figure 70).
10. Install a bolt to the rear hole of the taillight bracket
using a 7.8 x 18.7 mm (5/16 x ¾ in) bolt, washer,
and nylon locking nut (Figure 71).
Figure 71: Install rear taillight bracket
11. Loosely attach the rear taillight to the bracket.
Ensure that the clear portion of the taillight faces
downward.
12. Drill three 7 mm (9/32 in) holes on the rear edge of
the side hopper wall (Figure 72).
Setup Instructions Page 35
Page 42
Figure 72: Drill holes on side hopper wall
13. Mark and drill ten evenly spaced holes with the
7 mm (9/32 in) drill bit along the upper lip of the
side hopper wall. Start 25 mm (1 in) away from the
front corner tube (Figure 76, left side view).
14. Repeat steps 1 through 13 on the opposite side of the
MH-400.
15. Drill six holes on the front bottom lip of the front
panel (Figure 73).
Figure 74: Attach connector bracket
18. On the left side, run the Item 4 wire (3.45 m [11.5 ft]
length) from the rear taillight along the underside of
the lip on the hopper side wall, and down to the front
marker light.
19. Secure the wiring with the rubber clamps and
7.8 x 13.75 mm (5/16 x ¾ in) bolts. Use nylon
locking nuts on the inside of the hopper wall lip. See
Figures 80 and 81 for wire lengths and routing.
20. Run the Item 6 wire (1.2 m [4 ft] length) through the
front tube and out the bottom (Figures 75 and 80).
Leave enough wire to connect the side marker light.
Figure 73: Drill holes on lip of front panel
16. Position the 7-prong socket into the connector
bracket on the front of the MH-400, 20 cm (8 in)
from the left side corner tube.
17. Drill two 9 mm (11/32 in) holes, and attach the
connector bracket with two 7.8 x 13.75 mm
(5/16 x ¾ in) bolts and nylon locking nuts
(Figure 74).
Page 36 Setup Instructions
21. Place the number 6 grommet over the wiring and
Figure 75: Wire front marker light
into the hole drilled previously (into the tube).
Page 43
22. Finish running the wiring to the trailer plug. Secure it
using the rubber clamps and 7.8 x 13.75 mm
(5/16 x ¾ in) bolts.
Note – Ensure that you apply spiral wrap wire protector
to any part of the wiring that may come into contact with
sharp metal edges (Figure 79, Detail B).
23. On the right side, run the Item 4 wire
(3.45 m [11.5 ft] length) from the rear taillight, along
the underside of the lip on the hopper side wall, and
down to the front marker light.
24. Secure the wiring using the rubber clamps and
7.8 x 13.75 mm (5/16 x ¾ in) bolts. Use nylon
locking nuts on the inside of the hopper wall lip
(Figure 76). See Figures 80 and 81 for wire lengths
and routing.
Figure 77: Wire side marker light
26. Place the number 6 grommet over the wiring and into
the hole drilled previously (into the tube).
27. Finish running the wiring to the trailer plug. Secure it
using the rubber clamps and 7.8 x 13.75 mm
(5/16 x ¾ in) bolts.
Figure 76: Wire rear taillight
25. Place the Item 5 wire (2.1 m [7 ft] length) through
the right front tube and out the bottom. Leave
enough wire to connect the side marker light
(Figure 77).
28. Note – Ensure that you apply spiral wrap wire
protector to any part of the wiring that may come
into contact with sharp metal edges (Figure 79,
Detail B).
29. Follow Figure 77 to connect all wiring to the lights
and the trailer plug on both sides.
Note – The ground wire for the rear taillights must be
connected to the taillight mounting bolts (Figure 78).
Figure 78: Connect ground wire to rear taillights
Note – Remember to apply heat to any shrink connectors
you install. Do not overheat the connectors.
Setup Instructions Page 37
Page 44
Note – When connecting the wiring to the rear of the
7-prong socket, ensure that you run the wiring through
the protective rubber sleeve before attaching the wires to
the socket.
30. Attach the tow vehicle and the 7-prong wiring socket
to the tow vehicle in a convenient mounting place.
31. Follow Figure 80 to connect the necessary wiring to
the 7-prong wiring socket from the tow vehicle.
32. Install the Item 11 reflective tape (15 cm [6 in]) to
the front and rear outer edges of the fenders on the
MH-400. Apply white tape on the front and red tape
on the rear (Figure 80, rear view and front view).
33. Ensure that all bolts, wire connections, and routing
are secure.
34. Test the wiring system to ensure proper installation.
Page 38 Setup Instructions
Page 45
3
2
5
&
@
7
Figure 79: Light kit wiring assembly
Setup Instructions Page 39
Page 46
Figure 80: Light kit wiring schematic
Page 40 Setup Instructions
Page 47
Figure 81: Light kit wiring harness assembly
Setup Instructions Page 41
Page 48
Maintenance Instructions
How to Change Tires
How to Change an Outside Tire
1. Keep the MH-400 attached to the tow vehicle,
remove any options, and apply the emergency brake.
2. Remove all material from the hopper.
3. Block the tires on the opposite side of the flat tire.
4. Loosen the six wheel bolts on the flat tire with a lug
wrench, but do not remove them.
5. Hoist or jack the MH-400 until the tire is off the
floor or ground. Ensure that the MH-400 is stable.
6. Remove the loose wheel bolts and remove the tire.
7. Repair the damaged tire.
8. Re-install the tire onto the MH-400 by reversing the
above steps.
5. Re-install the tire onto the MH-400 by reversing the
above steps.
Note – Ensure that the wheel is centered on the hub and
all six wheel bolts and the bearing bolts are tight to 13.8
kg/m (100 ft-lb).
How to Change the MH-400 Conveyor
Belt
Read these instructions before removing the belt. If the
belt is completely destroyed, simply use a knife to cut the
belt in an undamaged area. If you intend to make a
warranty claim, the belt supplier must inspect the belt to
evaluate the damage and make recommendations for
replacement.
How to Remove the Belt
1. Remove the yellow safety covers located on the four
outer corners of the MH-400.
2. Remove the guides for the inner rubber liner from
the front and both sides of the hopper, with the metal
rails attached.
Note – Ensure that the wheel is centered on the hub and
all six wheel bolts are tight. Torque in a crossover pattern
to 11 kg/m (80 ft-lb).
How to Change an Inside Tire
9. Keep the MH-400 attached to the tow vehicle,
remove any options, and apply the emergency brake.
10. Remove all material from the hopper.
11. Block the tires on the opposite side of the flat tire.
1. On the side with the tire to be changed, remove the
four 15.6 mm (⅝ in) bolts holding the walking beam
suspension’s bearings to the chassis. (Loosen but do
not remove the outside wheel nuts to give more
clearance for bearing bolts.)
2. Hoist or jack the MH-400 until the inside tire and
walking beam axle assembly can be rolled out from
underneath. Ensure that the MH-400 is stable.
3. Remove the tire.
4. Repair the damaged tire.
3. Remove the silicone sealer on the rear of the metal
rails (but remember to re-apply the silicone sealer
when re-installing them).
4. At both front corners, use two wrenches to hold the
end of the tensioner rod stationary.
5. Loosen the nut closest to the end of the tensioning
rod.
6. Move the inside-adjusting nut back until the
tensioning rod clears the pillow block bearing.
Note – The front idler roller is supported by two pillow
block bearings sitting in an upper and lower guide (one
set on each side of the MH-400).
7. Support the front idler roller.
8. Go to the right front corner and remove the locking
collar that holds the pillow block bearing on the
shaft. Do this by backing off the set screws and
turning the locking collar counter-clockwise. Using a
hammer and punch, tap the locking collar counterclockwise until it releases from the shaft.
Page 42 Maintenance Instructions
Page 49
9. Repeat this step for the left front corner.
10. Remove the pillow block bearings by sliding the
idler roller back so the pillow block bearings slide
out of their guides.
11. Remove the two safety brackets and slide the roller
down through the open hole.
12. Go to the rear of the MH-400 and loosen the
tensioning sprocket.
13. Remove the chain from the drive sprocket.
14. Loosen the set screws on the drive sprocket and
remove the drive sprocket and key from the drive
roller shaft.
15. Support the rear drive roller.
I
MPORTANT: Do not disturb the rear roller adjustment
bracket assembly. It is designed to adjust the rear
roller automatically if the belt is not tracking
accurately.
16. Remove the four bolts in the flange bearings on both
sides.
19. Lower the drive roller down through the slots.
20. Remove the rear gate for a better view.
21. Note the position of the cartridge inside the hopper,
so that you can re-install it in the same position and
direction. It is bolted in six places along the side of
the MH-400 (three 4-bolt plates on each side).
22. Secure the cartridge by using straps from a lifting
device on each of the four corners.
23. Remove the 24 bolts to release the cartridge
(Figure 83).
17. Remove the locking collars next to the flange
bearings on the shaft, and slide both bearings off the
shaft.
18. Remove the two option attachment brackets
(Figure 82).
Figure 82: Remove the option attachment brackets
Figure 83: Secure and remove the belt cartridge
24. Remove the cartridge by lifting it out from the top of
the MH-400. Place it on the ground (Figure 81).
Figure 84: Lift out the belt cartridge
Maintenance Instructions Page 43
Page 50
How to Install the Belt
To install a new belt, reverse the above instructions, but
keep in mind the following important notes and
instructions.
I
MPORTANT: The conveyor belt is designed to work
primarily in one direction. Ensure that the painted
arrow in the middle of the belt is pointing towards the
rear of the MH-400 (looking down from above).
MPORTANT: Before sliding the rear drive roller back
I
up through the slot and into place, ensure that you
have already installed the four bolts (from the inside
facing out) for connecting the pillow block bearings.
Otherwise, you will have to remove the drive roller to
gain enough clearance to install these bolts.
When installing the rear drive roller, ensure that the shaft
connecting to the motor is on the left side. It has a
keyhole cut into it for securing the drive sprocket.
Before applying tension with the tensioner rods at the
front of the MH-400, use your hands to manually center
the belt at the front and rear.
Track and tension the belt by following the instructions in
the Maintenance section of the Operator’s Manual.
The front idler and rear drive rollers provide excellent
traction for pulling the belt under load, so do not overtighten or stretch the belt.
Apply silicone sealer to the rear side of the metal rails
and at the two front corners of the floor where the rails
meet. The sealer deflects any material from getting past
the rails.
Page 44 Maintenance Instructions
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