Page 1
OWNER’S
]RA]\EAL
POWER
VACUUMS
.75
Model Numbers
242-675A
242-685A
24677A
24687A
Important:
Read Safety Rules and
Instructions Carefully
Thank you for purchasing an
American built product.
PRINTED IN U.S.A.
FORM NO. 770-1794
(R810807)
Page 2
INDEX
Safe Operation Practices
Assembly Instructions
Operation
Maintenance ................................................................. 9
......................................................................
..............................................
...................................................
3
4
8
r
LIMITED WARRANTY
♦
♦
♦
♦
♦
♦
♦
♦
For one year from the date of original retail purchase, MTD PRODUCTS INC will either
repair or replace, at its option, free of charge, F.O.B. factory or authorized service firm, any
part or parts found to be defective in material or workmanship. Transportation charges for
the movement of any power equipment unit or attachment are the responsibility of the pur
chaser. Transportation charges for any parts submitted for replacement under this warran
ty must be paid by the purchaser unless such return is requested by MTD PRODUCTS INC.
This warranty will not apply to any part which has become inoperative due to misuse, ex
cessive use, accident, neglect, improper maintenance, alterations, or unless the unit has
been operated and maintained in accordance with the instructions furnished. This warran
ty does not apply to the engine, motor, battery, battery chargeror component parts thereof.
Please refer to the applicable manufacturer’s warranty on these items.
Off-Season Storage......................................................
Illustrated Parts
Replacement Parts List
Parts Information ..........................................Back Cover
.....................................................
.........................................
12, i
13, 15
t
♦
♦
♦
♦
♦
♦
♦
♦
♦
The equipment which you have just purchased does not have a spark arrester. If this equipment is used on
any forest covered land, brush covered land, or grass covered unimproved land in the State of California,
before using on such land, the California law requires that a spark arrester be provided. In addition, spark
arrester is required by law to be in effective working order. The spark arrester must be attached to the
exhaust system and comply with Section 4442 of the California Public Resources Code.
This warranty will not apply where the unit has been used commercially.
Warranty service is available through your local authorized service dealer or distributor. If
you do not know the dealer or distributor in your area, please write to the Customer Service
Department of MTD.
The return of a complete unit will not be accepted by the factory unless prior written per
mission has been extended by MTD.
This warranty gives you specific legal rights. You may also have other rights which vary
from state to state.
I WARNING \
TO PURCHASERS
OF INTERNAL COMBUSTION ENGINE EQUIPPED
MACHINERY OR DEVICES IN THE STATE OF CALIFORNIA
Page 3
IMPORTANT
It is suggested that this manual be read in its entirety before attempting to assemble or operate. Keep this
manual in a safe place for future reference and for ordering replacement parts.
This unit is shipped WITHOUT GASOLINE or OIL. After assembly, see operating section of this manual for
proper fuel and amount.
SAFE OPERATION PRACTICES FOR POWER VACUUMS
1. Read this operating and service instructing manual
carefuHy. Be thoroughly familiar with the controls
and proper use of the power vacuum.
2. Never allow children to operate this power
vaccum.
3. Keep the area of operation clear of all persons,
particularly small children and pets.
4. Check fuel before starting engine. Do not fill fuel
tank indoors, when engine is running, or while
engine is hot. Wipe off any spilled fuel before
starting engine.
5. Do not change engine governor settings.
.. Do not put hands near rotating parts for any
reason.
7. If the power vacuum should start to vibrate
abnormally, stop the engine and check immedi
ately for the cause. Vibration is generally a
warning of trouble.
8. Before cleaning, repairing or inspecting, make
certain all moving parts have come to a complete
stop. Disconnect spark plug wire and keep wire
away from plug to prevent accidental starting.
Also keep throttle control lever in the stop
position.
9. If the power vacuum should become blocked with
debris at any point, shut engine off and wait
until the impeller comes to a complete stop
before attempting to remove the obstruction.
Disconnect spark plug wire to prevent accidental
starting.
10. Check all bolts for tightness at frequent periods.
11. Never store this power vacuum with fuel in the
tank. Allow engine to cool before storing in
any enclosure.
12. Keep bag and equipment free of debris when not
in use.
13. Never operate this power vacuum unless air duct
and vacuum bag are properly affixed in their
place. Large zippered end of bag must be closed
when operating to prevent objects from being
blown out.
14. Never empty vacuum bag when engine is running.
15. Never change inlet nozzle or auxiliary hose attach
ment when engine is running.
16. The manufacturer recommends that the operator
wear safety glasses or some other suitable eye
protection when operating this machine.
17. Check the vacuum bag frequently for wear and
replace when necessary.
18. Never operate as a leaf blower unless impeller
guard and guard assembly are properly affixed in
their place.
19. Exercise caution whenever operating as a leaf
blower. Do Not allow discharge to be pointed in
the direction of persons.
Page 4
ASSEMBLY
INSTRUCTIONS
CONTENTS OF HARDWARE PACK
(See Figure 1.)
FIGURE 1.
IVI
A
B
C
D
E
F (3)
G (3) Belleville Washers
H
1 (4)
J
K (2) Stud Pins
L (2)
LOOSE
(See Figure 2.)
M
N
0
P
Q
R
S
* Self-Propelled Models 685 and 24687 Oi
Clutch Grip Assembly*
(1)
Hair Pin Cotter*
(1)
Clevis Pin*
(1)
Extension Spring*
(1)
Lock Nut 1 /4-20 Thread*
(1)
Hand Knobs
Heavy Flat Washer
(1)
Hex Bolts 1/4-20X 1.75" Long
(4) Hex Lock Nuts 1/4-20 Thread
Push-on Speed Nuts
PARTS IN CARTON
Bag
(1)
Nozzle
(1)
Upper Handle
(1)
Air Duct Assembly
(1)
Clutch Rod*
(1)
Directional Discharge Assembly
(1)
Impeller Guard
(1)
FIGURE 2.
m'
FIGURE 3.
otL LEVILLE WASHER (G)
1
TOOLS REQUIRED:
(2) 7/16" Open End or Box Wrenches.
(1) Hammer or Mallet.
(1) Adjustable Wrench.
1. Place nozzle (N) in position on front of housing
so that it rests in flanges. Secure with one hand
knob (F) and belleville washer (G). See figure 3.
Page 5
UPPER
HANDLE (O)-
I
FIGURE 4.
2. Place the upper handle (0) in position over lower
handle. Fasten with four hex bolts (I) and lock
nuts (J) provided. See figure 4. Two 7/16"
wrenches are required.
LOCK NUT (
STUD PIN (K i
Place the stud pins (K) in holes in upper handle
(head of pins go to the inside of handle). Secure
pins with push-on speed nuts (L) by holding
speed nut with box wrench and tapping pin with
hammer. See figure 5.
FIGURE 5.
BELLEVILLE
WASHER (G)-
HAND
KNOB (F)
UPPER
HANDLE
4. Place air duct assembly (P) over opening on top
of housing. Secure with two hand knobs (F) and
belleville washers (G). See figure 6.
DUCl
EMBLY (P)
FIGURE 6.
Page 6
ELASTIC
OPENING
FIGURE 7.
TOP STRAP
ON BAG
/
ON HANDLE
X
BAG (M)
CLUTCH GRIP
ASSEMBLY (A)
5. Assemble the bag by slipping the top straps on
bag (M) over upper handle. Hook two small straps
over stud pins on handle. Slip elastic opening of
bag over air duct assembly. See figure 7.
NOTE
Steps 6, 7 and 8 for self-propelled
units only.
HAIR PIN
COTTER (B)
FIGURE 8.
LOCK NUT (E)
CLUTCH ROD (Q)
CLEVIS PIN (C)
EXTENSION
SPRING (D)
6. Assemble the clutch grip (A) to the left hand
side of upper handle. Secure in place with clevis,
pin (C) and hair pin cotter (B). See figure 8. Head
of clevis pin should be to the outside of handle.
7. Slide the extension spring (D) onto clutch rod (Q)
as shown in figure 9. Thread lock nut (E) onto
clutch rod approximately 2 1/2 inches.
FIGURE 9.
Page 7
Hook top (hooked end) of clutch rod into clutch
grip. Hook spring into clutch bracket assembly.
See figure 10. Spring should not have any slack.
Adjust nut so that when the clutch grip is all the
way up, there is no slack in the spring.
^ WARNING \
FIGURE 10.
FIGURE 11.
Engine must be stopped (off) and
spark plug wire disconnected.
ASSEMBLY INSTRUCTIONS
To Convert from a Vacuum to a Leaf Blower.
1. Remove the bag.
2. Remove the air duct assembly by removing two
hand knobs and belleville washers.
3. Remove the nozzle by removing one hand knob
and belleville washer.
4. Remove the hand knob and belleville washer
holding the housing to engine brace. See figure 11.
FIGURE 12.
5. Lift up on the housing and rotate it 90° clock
wise. Chute opening should be to the right hand
side when viewed from the front of unit. See
figure 12.
6. Place the impeller guard (S) into flanges on front
of housing. Line up hole in screen with hole on
housing. Secure with one hand knob, belleville
washer and heavy flat washer (H). See figure 12.
Page 8
L.lFV-iri.r >.\ASH[ K
.. I
7. Place the directional discharge assembly (R) over
chute opening. Secure with two hand knobs and
belleville washers. See figure 13.
HAND KNOB
FIGURE 13.
\
DIRECTIONAL
DISCHARGE
ASSEMBLY (R)
OPERATION
PRE-START PREPARATIONS
Service engine with gas and oil. See engine manual
packed with vacuum for complete instructions for
care and maintenance of engine. READ DIREC
TIONS CAREFULLY.
TO START ENGINE
After the engine has been properly fueled and oiled
(refer to engine operating and maintenance instruc
tions), start engine following the instructions below.
Operate a new engine at intermediate speeds and light
load for the first few hours as you would a new
automotive engine.
IMPORTANT
The vacuum bag has an air escape
located on the upper right hand side.
The air escape should be opened when
the vacuum is in use. See figure 14.
1. Move throttle control lever on engine to START
position.
2. Crank engine. Pull recoil with quick firm pull.
Do not pull out so far the rope stops with a jerk
as this will cause rope failure. Do not allow rope
and handle to snap back into place.
3. After two or three full firm pulls on recoil (or as
soon as engine fires), move speed control to run
position.
4. Self-Propelled Units Only - To engage the drive
mechanism, squeeze the clutch grip against the
upper handle. Release the clutch grip to stop the
forward motion.
TO STOP ENGINE
1. To stop engine, move throttle control lever to
STOP position.
2. Disconnect spark plug wire and ground to prevent
accidental starting while equipment is unattended.
I
AIR ESCAPE OPENED
LARGE ZIPPER CLOSED
FIGURE 14.
Page 9
ADJUSTMENTS
A
Do not at any time make any adjust
ment to the unit without first stopping
engine and disconnecting spark plug
wire.
HEIGHT ADJUSTMENT
To adjust the height of the nozzle, stand on the right
hand side of vacuum and move the index handle
towards the engine. Move handle towards rear of unit
to lower height. Move the handle forward to raise the
height. See figure 15.
CAUTION
Gear Box (Self-Propelled Units Only) - The gear box
lubricated with 2 ounces of High Temp. (450° F.)
grease. Order part number 737-0120. Periodically
check lubricant level by removing the two self-tapping
screws on the gear box cover and lifting off the
cover. Do not change grease; simply add if necessary.
MAINTEtJANCE
\ WARNING j
(D
Disconnect spark plug wire and ground
it against the engine before performing
any repairs or maintenance.
BELT REPLACEMENT (Self-Propelled Units Only)
1. Remove the nozzle or impeller guard from front
of air duct housing.
FIGURE 15.
CARBURETOR ADJUSTMENT
If carburetor needs adjustment to start or for oper
ation, see "Carburetor Adjustment" section of engine
manual.
CLUTCH ROD ADJUSTMENT (Self-Propelled
Units Only)
To adjust the clutch rod, refer to step number 8
under assembly instructions.
2. Remove hex bolt and lock washer from center of
impeller. See figure 16. A 9/16" socket wrench
with extension is needed.
Ï
IMPELLHK
ASSEMbLY
FIGURE 16.
LUBRICATION
Wheels - Rear wheels are provided with oil lite
bearings. Place a few drops of SAE 30 oil on each
bearing once a season.
3. Remove hand knob and belleville washer from
top of housing.
4. Remove two self-tapping screws which hold the
belt guard. See figure 17. A 3/8" wrench is
required. Lift off belt guard.
Page 10
FIGURE 17.
5. Slide belt off the impeller pulley. Slide housing
and impeller off engine crankshaft. Be careful
not to lose square key. See figure 18.
9. Secure impeller to crankshaft with hex bolt and
lockwasher, removed in step 2. Tighten securely.
10. Slip belt over impeller pulley and reassemble the
belt guard.
11. Reassemble the nozzle or impeller guard.
OFF-SEASON STORAGE
The following steps should be taken to prepare the
unit for storage.
1. Clean the engine and the entire unit thoroughly.
2. Refer to engine manual for correct engine storage
instructions.
3. Store unit in a clean, dry area.
ENGINE
CI-iANK .s
P.T.O.
PULLEY
FIGURE 18.
6. Slide belt off crank shaft.
7. Remove belt from P.T.O. pulley and install new
belt. See figure 18.
NOTE
When reassembling the new belt, the
aid of another person will be helpful.
8. Turn the crankshaft until the key way on shaft is
directly on top. While holding housing assembly
and impeller assembly, line up the key way on the
pulley with the key on the crankshaft, and slide
housing and impeller assemblies onto crankshaft.
10
Page 11
NOTES
11
Page 12
Models 675, 685,
24677 and 24687
If YOU WRITE TO US ABOUT THIS ARTICIE
OR IF YOU ORDER REPLACEMENT PARTS AL-e
WAYS MENTION THIS MODEL & SERIAL NO
MODEL
Page 13
PARTS LIST FOR MODELS 675, 685, 24677 and 24687
Ref.
No.
Part
Color
No.
Code
1
05778 Clutch Grip Ass'y-t 39 08187 Gear Box Cover t
DESCRIPTION
711-0679 Clevis Pin .375" Dia. x 1.88" 40
Lg.t
3 747-0154
4
749-0482
Clutch Rod 32 ' Lg. t 41
Handle Brace (5 H.P.Tecumseh) N
749-0483 Handle Brace (5 H.P. Briggs &
Stratton)
749-0484
Handle Brace (8 H.P. Tecumseh N
5 Part of Engine 44
6 710-0776
Hex Wash. Hd. "AB" Tap Scr.
1/4" X .62" Lg. t
7
14558 Belt Guard t N
714-0114
8
Square Key 1/4" x 1/4" x
Slew
Part
N
Ref.
No.
Part
Color
No.
Code
748-0135
715-0246
42 710-0726
43
712-0267
736-0119
45
736-0119
46 750-0372
47
14530
- 488
Bevel Gear .62" I.D. x 28
Teeth t
Spring Pin Spiral 3/16" Dia.
X 1.25" Lg. t
Hex Wash. Hd. "AB" Tap Scr.
5/16" X .75" Lg.
Hex Nut 5/16-18 Thd.*
L-Wash. 5/16" I.D.*
L-Wash. 5/16" I.D.*
Spacer.63 I.D. x 1.00" O.D.
X 1.12" Lg. t
Right Side Plate N
DESCRIPTION
7 00" La *
9 14536 - 488
14557 - 488
10
710-0442 Hex Bolt 5/16-18 X 1.50"
11
754-0219 "V"-Belt 1/2" X 26" Lg. t
12 736-0119
13
712-0267 Hex Nut 5/16-18 Thd.*
14
14527 - 488 Engine Mounting Frame
15 1544-019 Cotter Pin 5/32" Dia. x 1.25"
Air Vane Plate Ass'y- (675 and 48 715-0139
677) N
Air Vane Plate Ass'y- w/pulley t
49
748-0288 Drive Pinion t N ‘
50 710-0170
Lg.*
51 736-0159 Fl.-Wash. .34" I.D. x 87"
L-Wash. 5/16" I.D.*
52
Ass'y.
53
734-1035 Wheel Ass'y. - Comp. 12"x3"
54
750-0194
Spring Pin Spiral 3/16" Dia.
X .81" Lg. t
Hex Locking Bolt 5/16-24
X .62" Lg.
O.D.
Ball Bearings - Part of Wheel
Ass'y. (Ref. 53)
Spacer .63" I.D. x 1.00" O.D.
Lg.* X .94" Lg.
736-0187 Fl.-Wash. .63" I.D. x 1.25"
16
O.D.
17 736-0921 L-Wash. 1/2" I.D.* 57 720-0142
<8 712-0206 Hex Nut 1/2-13 Thd.*
)
712-0107 Hex Cent. L-Nut 1/2" I.D. 59
zO 732-0411 Extension Spring .78" O.D. 60
X 7.50" Lg. t N
21 734-1036 Swivel Caster Wheel 5" Dia. 61 710-0136
X 1.25"
22 732-0409
716-0104 Snap "E"-Ring .50" Dia.
23
Extension Spring .38" O.D.
X 3.18" Lg. t N 63 1539-019
Shaft t
55 710-0118
56 712-0267
Hex Bolt 5/16-18 X.75" Lg.*
Hex Nut 5/16-18 Thd.*
Flat Grip Vinyl
58 14561
Index Plate
710-0118 Hex Bolt 5/16-18 X .75" Lg.*
712-0107 Hex Cent. L.-Nut 1/4-20
Hex Bolt 1/4-20X 1.75"
N
62 764-0161 Vacuum Bag
Push Speed Nut for .25" Dia.
64
749-0481 Lower Handle N
Thd.
Lg.
Stud
24 756-0367 "V"-Pulley 5/8" x6.50" 65 712-0287 Hex Nut 1/4-20 Thd.*
N 66 736-0329 L-Wash. 1/4" I.D.*
Lg.
Lg.*
N
69 714-0145
Internal Cotter Pin 3/8
70 749-0480 Upper Handle
71 738-0185 Rear Axle .624" Dia. x
24.37" Lg.
715-0249 Spring Roll Pin 5/32" Dia.
N
X 1.12 t
N 73 750-0142 Spacer .82" I.D. x 1.00" O.D.
N X .305" Lg. t
74
736-0175
75 710-0352
L-Wash. .265" I.D. t
Hex Self Tap Scr. 1/4" x
3/8" Lg. t
76 14556
14555
R.H. Pinion Guard t
L.H. Pinion Guard (Not
Shown) t
748-0142
25
26 14570
27
40318
28 14565
29 714-0229
30
741-0225
31 738-0516
32 717-0493
33 14571
34 08348
748-0136
.35
.3 748-0108
08189
37
748-0110
38
O.D. t
Flange Bearing .502" I.D. t 67 711-0737 Stud Pin .250" Dia. x 1.75"
Gear Box Mounting Bracket t N
Extension Spring .50" O.D. x 68 710-0136 Hex Bolt 1/4-20X 1.75"
3.28" Lg. t
Clutch Bracket Ass'y. t
#2 Woodruff Key 3/32" Dia. Dia.
X .81 " Lg. t
Hex Flange Bearing Plastic
.625" I.D. t
Pinion Shaft .50" Dia. x 5.0" 72
Lg. t
Gear Box Ass'y. Comp, t
- 488 Caster Arm Ass'y.
Drive Shaft .624" Dia. x
22.75" Lg. t
Bevel Gear .50" I.D. x 14
Teeth t
Flange Bearing .503" I.D. t
Gear Box t
Flange Bearing .630" I.D. t
New
Part
N
N
N
N
N
N
t Parts for Self-Propelled Units (ModelSi 685 and 24687) Only.
13
Page 14
Models 675, 685,
24677 and 24687
14
Page 15
Models 675, 685,
24677 and 24687
PARTS LIST FOR M
Ref.
No.
PART
No.
1 14532 - 488
736-0242
2
3 720-0170
4
731-0516
5 14560
6 14549
7
8
732-0335 Compression Spring
14546
9 T4562
10
14563
11 712-0267
12 736-0119
13
14
15
710-0191
736-0217
14536 - 488
14557 - 488
16
14542 - 488 Blower Housing Complete
17 14541
18 710-0600
19 712-0158
20 736-0289
21 710-0260
22
710-0170
23 14539
24
728-0143
25 14569
26
735-0214
COLOR
CODE
ODELS 675, 685, 24677 and 24687
DESCRIPTION
Air Duct Assembly
Belleville Wash. .34" I.D. x
.87" O.D.
3-Arm Thumb Scr. 5/16-18 x
.75" Lg.
Trim Strip 36.5" Lg.
Impeller Guard ■ N
Door Assembly
Directional Discharge Ass'y.
(Includes Ref. No. 6 & 7) N
Nozzle Ass'y.
Nozzle Plate Ass'y.
Hex Nut 5/16-18 Thd.*
L-Wash. 5/16" I.D.
Hex Blot 3/8-24 X 1.25" Lg.*
L.-Wash. 3/8" IID. H.D.
Air Vane Plate Ass'y. (675
and 24677)
Air Vane Plate Ass'y. w/pulley
(685 and 24687)
Right Angle Bracket
Hex Wash. Hd. Self Tap Scr.
5/16-18 X .50" Lg.
Hex Cent. L.-Nut 5/16-18 Thd.
Shoulder Spacer .50" I.D. x
.135
Carriage Bolt 5/16-18 x .62"
Lg.*
Hex Locking Bolt 5/16-24 x
.62" Lg.
Housing - Engine Brace Ass'y.
Pop Rivet (5-Required)
Wiper Retaining Strip
Nozzle Wiper
New
Part
N
N
N
N
N
N
N
N
N
N
N
*For faster service obtain standard nuts, boits and washers
locally. If these items cannot be obtained localiy, order by
part number and size as shown on parts list.
(488 - Mack Truck Yellow)
(497 - Yard-Man Red)
When ordering parts, if color or finish is important use the
appropriate coior code shown above, (e.g. Mack Truck Yellow
Finish —14542 (488).)
This instruction manual covers various
models and all specifications shown do not
necessarily apply to your model. Specifica
tions subject to change without notice or
obligation.
NOTE
15
NOTE: The engine is not under warranty by
the vacuum manufacturer... If repairs or
service is needed on the engine, please
contact your nearest author
ized engine service outlet.
Check the “Yellow Pages" of
your telephone book under
“Engines—Gasoline.”
Find It Fast
In The
Yellow Pages
Page 16
KITD PRODUCTS INC ......................................................... YaRD-MaN COMPANY
P.O.BOX 36900 • CLEVELAND, OHIO 44136
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