Maxon DMD, DMD -22, DMD -33 Operation Manual

© MAXON Lift Corp. 2018

To fi nd maintenance & parts information for your DMD Liftgate, go to
www.maxonlift.com. Click the PRODUCTS, RAILIFT & DMD buttons.

Open the Maintenance Manual in the PRODUCT DOCUMENTATION
window.

To fi nd maintenance & parts information for your DMD Liftgate, go
to www.maxonlift.com. Click the PRODUCTS, RAILIFT & DMD
buttons. Open the Maintenance Manual in the PRODUCT DOCU-

MENTATION window. For parts, click on the PARTS PORTAL,
RAILIFT & DMD buttons.

M-16-39
JUNE 2018

TABLE OF CONTENTS

WARNINGS ..............................................................................5

LIFTGATE TERMINOLOGY .....................................................6

DECALS & PLATES ...............................................................7

FORKLIFT ADVISORY ............................................................9

OPERA TION ............................................................................10

UNFOLDING THE PLA TFORM ................................................10

LOADING VEHICLE .................................................................14

LOWERING THE PLA TFORM .................................................14

POSITIONING LOAD ...............................................................14

RAISING & UNLOADING PLATFORM .....................................15

UNLOADING VEHICLE ............................................................16

LOWERING THE PLA TFORM .................................................16

RAISING THE PLA TFORM ......................................................16

POSITIONING LOAD ...............................................................17

LOWERING & UNLOADING PLATFORM ................................18

STOWING PLATFORM ............................................................19

USING STANDARD CART STOPS (IF EQUIPPED) ...............22

USING RETENTION RAMP (IF EQUIPPED) ...........................25

4

THIS PAGE INTENTIONALLY LEFT BLANK

5

WARNINGS

2. Do not exceed rated load capacity of 2200 lb for DMD-22 Liftgate,
and 3300 lb for DMD-33 Liftgate.

3. Do not allow any part of your body to be placed under, within, or
around any portion of the moving Liftgate or its mechanisms, or in
a position that would trap them between the platform and the fl oor
of truck body (or between platform and the ground) when Liftgate

is operated.

4. Consider the safety and location of bystanders and
location of nearby objects when operating the Liftgate. Stand
to one side of platform while operating the Liftgate. Be certain
that the area the Liftgate will move through during operation
is clear of all obstacles.

5. Comply with all attached instruction decals and warning decals.

11. Above all, USE GOOD COMMON SENSE when operating this
Liftgate.

8. Do not move vehicle unless Liftgate is correctly stowed.

6. Keep decals clean and legible. If decals are illegible or missing,
have them replaced. Get free replacement decals from Maxon.

7. Never drive a forklift on the Liftgate platform.

10. A correctly installed Liftgate will operate smoothly and reasonably
quiet. The only noticeable noise during Liftgate operation is from
the power unit while the platform is being lowered and raised. Lis­ten for scraping, grating and binding noises and have the problem
corrected before continuing to operate the Liftgate.

MAXON Lift Corp. Customer Service

11921 Slauson Ave

Santa Fe Springs, CA 90670

[phone]

WARNING

!

9. Correctly stow platform when not in use. Extended platforms

could create a hazard for people and vehicles passing by.

1. Incorrect operation of this Liftgate can result in serious personal
injury. Comply with WARNINGS and Liftgate operating instructions
in this manual. Do not allow untrained persons or children to oper-

ate the Liftgate. If you need to replace an Operation Manual, ad­ditional copies are available from:

12. Never use a cell phone while operating the Liftgate.

6

LIFTGATE TERMINOLOGY

RUNNER

PLATFORM

LH COLUMN

MAIN FRAME

HOUSING

COVER

LOCK

POWER

UNIT

(BEHIND

COVER)

UP/DOWN

CONTROL SWITCH

(OUTBOARD)

UP/DOWN

CONTROL SWITCH

(INBOARD)

TRANSIT

HOOK

FOLD/UNFOLD

SWITCH

(IF EQUIPPED WITH

HYDRAULIC CLOSER)

RH COLUMN

7

DECALS & PLATES

DECAL “E”
DECAL “D”

DECAL “B”
DECAL “A”

NOTE: Ensure there is no residue,

dirt, or corrosion where

decals are attached. If
necessary, clean surface
before attaching decals.

FAMILY OWNED DECAL

P/N 283445-01

WARNING DECAL

P/N 298373-01

DECAL “C”

DECAL “F” OR “G”

DMD-22 ONLY

CAPACITY DECAL

P/N 220388-03

DMD-33 ONLY

CAPACITY DECAL

P/N 220388-02

WARNING DECAL

P/N 299274-01

COLUMN ARROW

DECAL “H”

P/N 289192-01

RUNNER ARROW

DECAL “H”

P/N 289192-01

8

DECALS

DECAL SHEET

P/N 289192-01

WARNING DECAL

P/N 298373-01

WARNING DECAL

P/N 299274-01

9

Keep forklift OFF of platform.

FORKLIFT ADVISOR Y

FIG. 9-1

FIG. 9-2

WARNING

!

10

1. Raise platform stop off transit
hook (FIG. 10-1A) by pushing the
outboard control switch to (UP)
position (FIG. 10-1).

UNFOLDING THE PLATFORM

OUTBOARD CONTROL

SWITCH (UP)

OPERATION

TRANSIT

HOOK

PLATFORM

FIG. 10-1

PLATFORM

STOP

FIG. 10-1A

11

2. Rotate transit hook away
from platform stop (FIG.
11-1A). Push outboard
control switch DOWN (FIG.
11-1) to lower the platform
slightly until platform stop
clears transit hook.

FIG. 11-1

TRANSIT HOOK

PLATFORM

STOP

PLATFORM

FIG. 11-1A

OUTBOARD

CONTROL

SWITCH (DOWN)

12

3. For manual close Liftgate, push platform lock
up to unlock the platform (FIG. 12-1A).
Manually unfold platform (FIG. 12-1). Next,
push platform lock down to lock
platform (FIG. 12-1B).

UNFOLDING PLATFORM

(MANUAL CLOSE)

FIG. 12-1

FIG. 12-1A

PLATFORM

LOCK

FIG. 12-1B

PLATFORM

LOCK

UNFOLDING THE PLATFORM - Continued

PLATFORM

NOTE: If platform is

equipped with hydraulic
closer, do step 4.

13

4. For Liftgate equipped with hydraulic closer, hold power
closer switch (FIG. 15-1) and lower outboard control
switch (DOWN) at the same time to unfold platform
(FIG. 13-1).

5. Unlock and unfold fl ipover (if equipped)
(FIG. 13-2).

FLIPOVER

UNFOLDING FLIPOVER

FIG. 13-2

LATCH

UNFOLDING PLATFORM

(EQUIPPED WITH HYDRAULIC CLOSER)

FIG. 13-1

POWER CLOSER

SWITCH (UNFOLD)

OUTBOARD CONTROL

SWITCH (DOWN)

PLATFORM

LOCK

14

Place all loads as close as
possible to the inboard edge of
the platform with heaviest part
toward the truck body as shown
in FIG. 14-2. Move loads across
the ramp (FIG. 14-2) to the
platform, but never rest or raise
loads on the ramp. If standing
on platform with the load, stand
in the footprint area shown
and comply with the preceding

WARNING.

A load should never extend past the edges of the platform. Do not
place unstable loads on platform and do not allow load to exceed
lifting capacity of Liftgate. If standing on platform, do not allow your
feet to extend beyond inboard edge of platform.

WARNING

!

LOADING PLATFORM AT GROUND LEVEL

FIG. 14-2

LOADING VEHICLE

POSITIONING LOAD

LOWERING THE PLATFORM

Use outboard control switch
to lower (DOWN) platform
(FIG. 14-1). Release toggle
switch when platform reaches
the ground.

FIG. 14-1

RAMP

INBOARD

EDGE

OUTBOARD

CONTROL

SWITCH (DOWN)

15

2. Carefully move the load
into vehicle (FIG. 15-1).

RAISING & UNLOADING PLATFORM

A ramp in retention position can trip you when stepping over it.
To prevent possible injury, get on the platform before putting the
ramp in retention position.

CAUTION

!

1. Use inboard control switch

to raise (UP) platform from
ground level to bed height
(FIG. 15-1). Release toggle
switch when platform
reaches bed height.

INBOARD CONTROL

SWITCH (UP)

3. Use inboard control

switch to lower (DOWN)
the platform to ground
level (FIG. 15-2).

MOVING LOAD INTO VEHICLE

FIG. 15-1

4. If there are more loads

to put in vehicle, repeat
the previous LOADING
VEHICLE steps for
each load. When
loading is fi nished, use
STOWING PLATFORM
procedure in this
manual.

LOWERING PLATFORM

FIG. 15-2

INBOARD CONTROL

SWITCH (DOWN)

16

UNLOADING VEHICLE

LOWERING THE PLATFORM

RAISING THE PLATFORM

Use inboard control switch to
raise (UP) platform (FIG. 16-2)
from ground level to bed height.
Release toggle switch when
platform reaches bed height.

FIG. 16-2

INBOARD CONTROL

SWITCH (UP)

Use inboard control switch
to lower (DOWN) platform
(FIG. 16-1). Release toggle
switch when platform
reaches the ground.

FIG. 16-1

INBOARD CONTROL

SWITCH
(DOWN)

17

A load should never extend past the edges of the platform. Do not
place unstable loads on platform and do not allow load to exceed
lifting capacity of Liftgate. If standing on platform, do not allow your
feet to extend beyond inboard edge of platform.

WARNING

!

POSITIONING LOAD

PUSHING LOAD ON PLATFORM

FIG. 17-1

Load the platform at bed level
(FIG. 17-1) as follows. Push load
out of the vehicle to correct posi­tion on the platform. Place all loads
as close as possible to the inboard
edge of the platform with heaviest
part toward the vehicle body as
shown in FIG. 17-1. If standing on
platform with the load, stand in the
footprint area shown and comply
with the WARNING at the top

of this page.

Pulling the load from vehicle to platform can result in a fall from
platform and serious injury. When unloading vehicle, always push
the load out on the platform.

!

WARNING

UNLOADING VEHICLE - Continued

INBOARD

EDGE

18

1. Use outboard control switch
to lower (DOWN) platform
to the ground (FIG. 18-1).
Release toggle switch

when platform reaches

ground level.

Before lowering platform, make sure area surrounding platform is
clear of people and objects. If standing on platform, do not allow
your feet to extend beyond inboard edge of platform.

WARNING

!

2. Carefully move load off platform
(FIG. 18-2) and then move it to

a place where it will not become
a hazard for people and other
vehicles. If there is more to
unload from vehicle, repeat
the previous UNLOADING
VEHICLE steps for each load.
When unloading is fi nished,
use STOWING PLATFORM
procedure in this manual.

LOWERING & UNLOADING PLATFORM

MOVING LOAD OFF PLATFORM

FIG. 18-2

OUTBOARD

CONTROL

SWITCH

(DOWN)

LOWERING PLATFORM TO GROUND LEVEL

FIG. 18-1

19

1. Use outboard control
switch to raise (UP)
platform to comfortable
height (12“ to 18”) above
ground level (FIG. 19-1).

2. Fold and lock fl ipover (if

equipped) (FIG. 19-2).

FIG. 19-1

FIG. 19-2

NOTE: Ensure platform is stowed under hydraulic pressure.

STOWING PLATFORM

FLIPOVER

LOCK

OUTBOARD

CONTROL

SWITCH (UP)

20

3. Pull UP on platform lock
(FIG. 20-1A) to unlock

platform. Fold platform
to stowed position (FIG.

20-1). Push platform lock
DOWN to lock platform
(FIG. 20-1B).

FOLDING PLA TFORM

FIG. 20-1

FIG. 20-1A

4. If equipped with hydraulic closer,
(FIG. 20-2) use one hand for
outboard control switch (UP)

(FIG. 20-2A) and one hand

for FOLD/UNFOLD switch
(FIG. 20-2B). Activate FOLD
and UP together until platform
is folded.

STOWING PLATFORM - Continued

FOLDING PLATFORM WITH HYDRAULIC CLOSER

FIG. 20-2

NOTE: If platform is

equipped with hydraulic
closer, do step 4.

Folding the platform with
hydraulic closer requires 2
hands on the controls. This
helps prevent injuries.

CAUTION

!

FOLD/UNFOLD

SWITCH

FIG. 20-2B

OUTBOARD CONTROL

SWITCH (UP)

FIG. 20-2A

PLATFORM

LOCK

FIG. 20-1B

21

5. Use outboard control
switch to raise (UP)
platform (FIG. 21-1) to
clear transit hooks (FIG.
21-1A). Final platform
resting position is shown in

FIG. 21-1B.

RAISE PLATFORM

FIG. 21-1

OUTBOARD

CONTROL SWITCH

(UP)

PLATFORM

TRANSIT

HOOK

FIG. 21-1B

FIG. 21-1A

22

NOTE: Some Liftgates are equipped with single or dual cart stops.

Cart stops prevent loaded carts from rolling off outboard end
of platform. Single cart stops are 1 section, about the same as
overall width of platform, and operate with one set of controls.
Dual cart stops are 2 identical sections, with a combined
width about the same as overall width of platform, and each
is independently operated with separate controls (1 set of
controls per cart stop). The following procedure shows how to
operate dual cart stops; however, a single cart stop operates
the same way.

CAUTION

!

To prevent injuries caused by tripping and falling, make sure
cart stops are closed before walking on and off outboard end of
platform.

USING STANDARD CART STOPS (IF EQUIPPED)

1. Load a platform with cart stops

at ground level as follows.
Make sure cart stops are
closed when loading the plat­form (FIGS. 22-1 and 22-2).
Then, move load on the plat­form as shown in FIG. 22-1.

LOADING PLATFORM AT GROUND LEVEL

(CART STOPS CLOSED)

FIG. 22-1

CLOSING CART STOPS

(RH VIEW OF FLIPOVER)

FIG. 22-2

2. To close cart stops, push

shoot bolt to position shown
in FIG. 22-2. Step on cart
stops and push down into
locked position.

CART STOPS

CART STOP

SHOOT BOLT

23

3. To open cart stops, push shoot
bolt in direction shown in FIG.

23-1.

4. Open cart stops (FIGS. 23-1
and 23-2). Next, position cart

and stand in the footprint area
as shown in FIG. 23-2.

CART STOPS OPEN

FIG. 23-2

OPENING CART STOPS

(RH VIEW OF FLIP OVER)

FIG. 23-1

5. Raise the platform to bed

level (FIG. 25-3). Move
the load off the platform
into the vehicle body

(FIG. 25-3).

UNLOADING PLATFORM AT BED LEVEL

FIG. 23-3

CART STOP

PLATFORM

CART STOPS

TRUCK

BODY

INBOARD

EDGE

SHOOT

BOLT

24

6. When loading the platform
at bed level, make sure cart
stops are open (FIG. 24-1).
Push load out of the vehicle
to correct position on the
platform. Place all loads
as close as possible to the
inboard edge of the platform
with heaviest part toward the
truck body as shown in FIG.
24-1. If standing on platform
with the load, stand in the
footprint area shown and
comply with the WARNING
on page 19.

Pulling the load from vehicle to platform can result in a fall
from platform and serious injury. When unloading vehicle,
always push the load out on the platform.

WARNING

!

LOADING PLATFORM AT BED LEVEL

(DUAL CART STOPS OPEN)

FIG. 24-1

7. Unload the platform with cart

stops at ground level as fol­lows. Make sure cart stops
are closed when unloading
the platform (FIG. 24-2).
Move cart enough to close
cart stop. Then, move load
off the platform as shown in

FIG. 24-3.

CART STOPS CLOSED

FIG. 24-3

CLOSING CART STOPS

(RH VIEW OF FLIPOVER)

FIG. 24-2

CART

STOPS

USING STANDARD CART STOPS (IF EQUIPPED)

- Continued

PLATFORM

CART

STOPS

INBOARD

EDGE

TRUCK

BODY

CART STOP

SHOOT BOLT

25

USING RETENTION RAMP (IF EQUIPPED)

NOTE: Some Liftgates are equipped with a retention ramp. A reten-

tion ramp, like a cart stop, prevents a load from rolling or slid­ing off outboard end of platform. Unlike a cart stop, a retention
ramp lets you use the entire load surface of platform. The
catches on top of the fl ipover and a cam-like hinge action
keep retention ramp stowed when not in use. The cam-like
hinge also allows the retention ramp to be rotated and locked
in retention position or in ramp position. The following proce­dure shows how to operate a retention ramp.

CAUTION

!

To prevent injuries caused by tripping and falling, make sure
retention ramp is in the ramp position before walking on and off
outboard end of platform.

FIG. 25-1

RETENTION

RAMP

26

To prevent injuries, stay clear of the retention ramp path as it is
moved to ramp position. Go to either side of the ramp and stay
out of the way.

CAUTION

!

NOTE: To unhook the retention ramp, stand at the RH side of

fl ipover. After the retention ramp is unhooked, the recom­mended place for handling the retention ramp is at the
center of the free edge (FIG. 26-2).

1. Unhook retention ramp (FIG.

26-1). To release from the

catches, pull retention ramp to­ward outboard end of fl ipover as
shown in FIG. 26-2.

UNHOOKING RETENTION RAMP

(RH VIEW OF FLIPOVER)

FIG. 26-1

RELEASING RETENTION RAMP

(TOP VIEW OF FLIPOVER)

FIG. 26-2

HOOK

(LIFT HERE)

PULL

RETENTION

RAMP

CATCH

(2 PLACES)

RETENTION

RAMP

PULL

HERE

FLIPOVER

USING RETENTION RAMP (IF EQUIPPED)

- Continued

27

3. When cart is on platform,
place the retention ramp in
the retention position (FIGS.
27-3 and 27-4). Next, stand
in the footprint area shown in

FIG. 27-3.

RAMP IN RETENTION POSITION

FIG. 27-3

RETENTION

RAMP

ROTATING TO RETENTION POSITION

(RH VIEW OF FLIP OVER)

FIG. 27-4

RETENTION

2. Continue to pull retention ramp
to the retention position (FIG.
27-1) and then to ramp posi-
tion (FIG. 27-2).

MOVING TO RAMP POSITION

(RH VIEW OF FLIP OVER)

FIG. 27-2

RAMP

MOVING TO RETENTION POSITION

(RH VIEW OF FLIP OVER)

FIG. 27-1

PULL

RETENTION

CAUTION

!

To prevent injuries, stay
clear of the retention ramp
path as it is moved to
ramp position. Go to either
side of the ramp and stay
out of the way.

28

4. When loading the platform
at bed level, make sure
retention ramp is in the
retention position (FIG.
30-1). Push load out of the
vehicle to correct position
on the platform. Place all
loads as close as possible
to the inboard edge of
the platform with heaviest
part toward the truck body
as shown in FIG. 28-1.
If standing on platform
with the load, stand in the
footprint area shown and
comply with the WARNING
on page 19.

LOADING PLATFORM AT BED LEVEL

(RAMP IN RETENTION POSITION)

FIG. 28-1

Pulling the load from vehicle to platform can result in a fall
from platform and serious injury. When unloading vehicle,
always push the load out on the platform.

WARNING

!

5. Unload the platform with
retention ramp at ground
level as follows. Make sure
retention ramp is in the ramp
position when unloading the
platform (FIG. 28-2). Move
cart enough to reposition
retention ramp. Then, move
load off the platform as
shown in FIG. 28-3.

UNLOADING PLATFORM AT GROUND LEVEL

(RAMP POSITION)

FIG. 28-3

RAMP

POSITION

RETENTION

RAMP

USING RETENTION RAMP (IF EQUIPPED)

- Continued

ROTATING TO RAMP POSITION

(RH VIEW OF FLIPOVER)

FIG. 28-2

TRUCK

BODY

PLATFORM

INBOARD

EDGE

RETENTION

RAMP

29

6. To stow, rotate retention ramp to
retention position and then to the
fl at position on fl ipover as shown
in FIG. 29-1.

RAMP HOOKED TO FLIPOVER

(RH VIEW OF FLIPOVER)

FIG. 29-3

HOOK

RETENTION

RAMP

ROTATING RAMP TO STOWED

POSITION (RH VIEW OF FLIPOVER)

FIG. 29-1

STOWED

7. Push the retention ramp fully into

the catches (FIG. 29-2). Make
sure retention ramp is hooked to
the fl ipover (FIG. 29-3).

STOWING THE RAMP

(TOP VIEW OF FLIPOVER)

FIG. 29-2

CATCH

FLIPOVER

RETENTION

RAMP

FLIPOVER