Little Wonder 5621 User manual

© 2005 Little Wonder, Div. of Schiller-Pfeiffer Inc. All Rights Reserved.
SELF PROPELLED
Models 5621 and 5631

1.
Table of Contents Important Information
A. Introduction
On behalf of everyone at Little Wonder , we would like to
thank you for your purchase of a Little Wonder High
Performance Vac. This professional debris handling machine
was designed to the highest standards to ensure you many
hours of uninterrupted service.
This manual provides the information necessary for safe and
efficient operation and service. For your safety, it is critically
important that you read and understand this entire manual
before operating your High Performance Vac.
Specifications:
Model Dry Weight Max Rpm
5621 258 lbs. 3400
5631 260 lbs. 3400
B. Service Information
High Performance Vac Unit
Contact your local
Little Wonder dealer.
Engine
Contact an authorized Briggs & Stratton dealer. Dealers are
listed in the Yellow Pages under “Lawn and Garden Equipment
Supplies”, “Lawn Maintenance” or “Lawn Mowers”. Your
dealer will need to know the model and serial number of your
engine. For their location, please consult the operator’s manual
provided with your engine.
C. Special Safety Information
WARNING DANGER
ATTENTION: THIS SYMBOL POINTS OUT
IMPORTANT SAFETY INSTRUCTIONS
WHEN YOU SEE THIS SYMBOL
HEED ITS WARNING! STAY ALERT!
WARNING DANGER
TO REDUCE THE POTENTIAL FOR ACCIDENTS,
COMPLY WITH THE SAFETY INSTRUCTIONS IN
THIS MANUAL. FAILURE TO COMPLY MAY RESULT
IN SERIOUS PERSONAL INJURY AND OR
EQUIPMENT AND PROPERTY DAMAGE.
WARNING DANGER
THE ENGINE EXHAUST FROM THIS PRODUCT
CONTAINS CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.
Important Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Service Information . . . . . . . . . . . . . . . . . . . . .1
Special Safety Information . . . . . . . . . . . . . . . .1
Unpackaging
Unpackaging Information . . . . . . . . . . . . . . . . .2
Safety and Warnings
Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . .2
General Safety Rules
Warnings - "Don’ts" . . . . . . . . . . . . . . . . . . . . .4
Warnings - "Do’s" . . . . . . . . . . . . . . . . . . . . . . .4
Engine/ Fuel Warnings - "Don’ts" . . . . . . . . . .5
Engine/ Fuel Warnings - "Do’s" . . . . . . . . . . . .5
Assembly Instructions
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Speed Controller Setup . . . . . . . . . . . . . . . . . . .7
Put Oil and Gasoline in Engine
Before Starting . . . . . . . . . . . . . . . . . . . . . . . . .8
Use of Lifting Lug . . . . . . . . . . . . . . . . . . . . . .9
Operation
Starting Instructions . . . . . . . . . . . . . . . . . . . . .9
Self-Propelled Setup . . . . . . . . . . . . . . . . . . . . .9
Vacuuming . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Empty Debris Bag . . . . . . . . . . . . . . . . . . . . . .10
Refueling the Engine . . . . . . . . . . . . . . . . . . .10
Storage and Maintenance
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .11
Removing Blockage in Moving Parts . . . . . . .12
Removing the Fan . . . . . . . . . . . . . . . . . . . . . .12
Changing V-Belt . . . . . . . . . . . . . . . . . . . . . . .12
Part Numbers
HPV Parts Assembly . . . . . . . . . . . . . . . . . . . .13
HPV Parts List . . . . . . . . . . . . . . . . . . . . . . . .14
HPV Engine Assembly . . . . . . . . . . . . . . . . . .15
HPV Deck Assembly . . . . . . . . . . . . . . . . . . .15
HPV Collector Assembly . . . . . . . . . . . . . . . .16
HPV Liner Assembly . . . . . . . . . . . . . . . . . . .17
HPV Nozzle Assembly . . . . . . . . . . . . . . . . . .17
Warranties
Warranty . . . . . . . . . . . . . . . . . . . . . .Back cover

2.
Unpacking
1. Remove Collector assembly, Nozzle assembly, and
Debris bag from the top section of the package.
2. Remove cardboard insert.
3. Cut away short side of box and fold down.
4. Pull and latch “transaxle engagement lever.”
See page 9.
5. Roll HPV base unit out of box.
P/N 600602
Warning Label
P/N 600605
Warning Label
Caution:
Thrown
objects.
Keep
bystanders
away.
Always wear
eye, ear and
breathing
protection.
Before
performing
any service or
maintenance,
disconnect spark
plug wire. Make
sure throttle is in
STOP position.
Read and
understand the
Owners Manual.
Store your
Owners Manual
in a safe place.
Keep hands and
feet away from
air discharge
areas. Rotating
fan will cause
serious injury.
Safety and Warnings
A. Safety Decals
An important part of the safety system incorporated in this
High Performance Vac are the warnings and informational
decals (labels) found on various parts of the unit.
These decals (labels) must be replaced if they become illegible
due to abrasion, etc.
It is your responsibility to replace the decals (labels) when they
become hard to read. The location of these decals and their
part numbers for ordering are shown on page 3.
WARNING DANGER
IMPROPER USE OR CARE OF THIS HIGH
PERFORMANCE VAC, OR FAILURE TO WEAR PROPER
PROTECTION CAN RESULT IN SERIOUS INJURY.
READ AND UNDERSTAND THE RULES FOR
SAFE OPERATION AND ALL INSTRUCTIONS
IN THIS MANUAL.
WEAR HEARING, EYE, AND BREATHING
PROTECTION.
P/N 600604

3.
P/N 600604
Safety and Warnings
P/N 600602
Warning Label
P/N 600605
Warning Label

4.
General Safety Rules
1. Read and understand manual.
2. Wear eye, hearing, and breathing protection, proper
clothing and footwear.
3. While operating the machine always be sure of a safe and
secure operating position, maintain a firm footing and
good balance at all times.
4. Keep area clear of children, pets, and bystanders.
5. Never attempt to use an incomplete machine or one fitted
with an unauthorized modification.
6. Avoid contact with and inhalation of harmful fluids, gases,
mists, fumes, and dust.
7. Do not allow children to operate machine.
8. Do not override or remove any safety devices.
12. Keep hands away from hose inlet and discharge chute.
13. Disconnect spark plug wire before doing any cleaning or
maintenance.
14. Wear gloves to protect your hands.
15. Beware that the machine is loud and, during normal
operation; may interfere with speech communication.
A. Warnings - "Don’ts"
Don’t attempt to remove materials from intake or discharge
when High Performance Vac is running, or fan is rotating.
Don’t install or remove components while High Performance
Vac is running. Turn off engine to make changeover. Be sure
throttle is in the stop position, and the High Performance Vac
has come to a complete stop. Remove the spark plug wire
from the spark plug before removing material.
Don’t attempt to repair High Performance Vac. Have repairs
made by qualified Little Wonder dealer or repairman. See that
only Little Wonder and recommended engine manufacturers
replacement parts are used.
Don’t leave the engine running while the High Performance
Vac is unattended.
Don’t store, spill, or use gasoline near flames or spark
B. Warnings - "Do’s"
Always dress properly. Do not wear loose clothing or jewelry.
They can be caught in moving parts. Use of sturdy gloves,
non-skid footwear and safety glasses are recommended.
Always wear ear protectors where possible. Use face filter to
avoid breathing dust.
Always stay alert. Watch what you are doing and use common
sense. Do not operate High Performance Vac when fatigued.
Always keep hands away from air intake and air outlet chute.
Keep both hands on handles when power is on.
Always maintain and examine High Performance Vac with
care. Follow maintenance instructions given in manual.
WARNING DANGER
9. FAN COASTS AFTER THE ENGINE IS TURNED OFF.
WARNING DANGER
DO NOT SMOKE WHEN FILLING FUEL TANK
WARNING DANGER
10. ROTATING FAN. DON’T ATTEMPT TO REMOVE
MATERIALS FROM INTAKE OR DISCHARGE WHEN
UNIT IS RUNNING, OR FAN IS ROTATING.
WARNING DANGER
DO NOT USE THE HIGH PERFORMANCE VAC IF THE
MUFFLER IS DEFECTIVE OR MISSING.
WARNING DANGER
11. DO NOT OPERATE UNIT IF EXCESSIVE VIBRATION
OCCURS; SHUT ENGINE OFF IMMEDIATELY!
REMOVE SPARK PLUG WIRES AND CHECK FOR
DAMAGED IMPELLER, LOOSE IMPELLER BOLT,
LOOSE IMPELLER KEY, OR LODGED
FOREIGN OBJECTS.

5.
WARNING DANGER
IF THE HIGH PERFORMANCE VAC IS USED
IMPROPERLY OR SAFETY PRECAUTIONS ARE NOT
FOLLOWED, THE USER RISKS SERIOUS INJURY TO
THEMSELVES AND OTHERS.
READ AND UNDERSTAND THE FOLLOWING
BEFORE ATTEMPTING TO OPERATE THIS
HIGH PERFORMANCE VAC.
WARNING DANGER
HANDLE FUEL WITH CARE. IT IS HIGHLY
FLAMMABLE. FUELING A HOT ENGINE OR NEAR
AN IGNITION SOURCE CAN CAUSE A FIRE AND
RESULT IN SERIOUS PERSONAL INJURY AND/ OR
PROPERTY DAMAGE.
D. Engine/ Fuel Warnings - "Do’s"
Always use fresh gasoline. Stale gasoline can cause
difficult starting, poor performance and leakage.
Always pull starter cord slowly until resistance is felt.
Then pull cord rapidly to avoid kickback and prevent
arm or hand injury.
The use of spark arrestor mufflers is required by law in
the state of California (Section 4442 of the California
Public Resources Code), as well as in other states or
municipalities. Federal laws apply on federal lands.
Always handle fuel with care; it is highly flammable.
Never add fuel to a machine with a running or hot
engine. Do not inhale fuel fumes as they are toxic.
The spark ignition system meets all requirements of
the Canadian Interference Causing Equipment
Regulations.
Don’t run engine when electrical system causes spark
outside the cylinder. During periodic checks of the
spark plug, keep plug a safe distance from cylinder to
avoid burning of evaporated fuel from cylinder.
Don’t check for spark with spark plug or plug wire
removed and grounded. Use an approved tester. Sparks
can ignite fumes.
Don’t run engine when the odor of gasoline is present
or other explosive conditions exist.
Don’t operate the unit if gasoline is spilled. Clean up
spill completely before starting engine.
Don’t refuel indoors or in an improperly ventilated
area.
Don’t operate your High Performance Vac if there
is an accumulation of debris around the muffler or
cooling fins.
Don’t touch hot mufflers, cylinders or cooling fins as
contact may cause serious burns.
B. Warnings - "Do’s" Continued
Always store High Performance Vac indoors. When not in use,
store High Performance Vac indoors in a sheltered area
(a dry place) where it’s not accessible to children. The High
Performance Vac, as well as fuel, should not be stored in a
house. Keep throttle in the stop position.
Always be sure High Performance Vac is fully assembled.
Never operate High Performance Vac without all guards and
deflectors in place. Ensure that all nuts, bolts, screws are
installed and properly tightened.
Always keep the throttle in the “stop” position when not in use.
Always keep a safe distance between two or more operators
when working together simultaneously.
C. Engine/ Fuel Warnings - "Don’ts"
Don’t fuel, refuel or check fuel while smoking or near
an open flame or other ignition source. Stop engine and
be sure it is cool before refueling.
Don’t leave the engine running while the High
Performance Vac is unattended. Stop engine before
transporting High Performance Vac from one place to
another.
Don’t start or run this High Performance Vac indoors,
or in an improperly ventilated area as poisonous carbon
monoxide and other gasses are emitted.

6.
A. Assembly
1. Attach the collector assembly to the base unit:
• Bolt the collector assembly to the frame with 4 sets of
bolts, washer, and nuts
• Slide the rectangular end of the collector over the housing
and mount the flange with 2 sets of washers and nuts
2. Attach the throttle control cable to the handle on the
collector assembly:
• Bolt throttle control lever to handle with washer and nut
• Secure throttle cable to handle with cable ties in 2 places
3. Install the band clamp into the debris bag (wear gloves
when handling band clamp):
• Slide the bracket end of the band clamp through the left
side opening of the sleeve on the debris bag until it
emerges from the right side
• Feed the tail end of the band (on the clasp side) behind
the bracket in the sleeve
• Pinch the wire form on the clasp together and connect it
through 2 holes in the adjustment bracket such that it will
close tightly over the collector
4. Connect the debris bag by placing it over the bottom lip of
the collector and closing the clasp to secure the bag. Adjust
the clasp wire form to the appropriate hole position on the
bracket to insure a tight fit. If the bag will not fit tight within
the range of the 3 adjustment holes, insert the bag seal strap:
• Unhook the wire form from the bracket
• Pull the tail end of the
band back out from
behind the bracket
• Feed one end of the seal
strap behind the metal
band and through the
channel to the other side
• Tuck the other end of
the seal strap behind
the bracket
(overlapping the lead
end of the seal strap)
• Feed the tail end of the
band clamp behind the
bracket (overlap the
seal strap)
• Connect the wire form
to the appropriate holes
in the bracket and
secure the debris bag to
the collector
5. Attach nozzle assembly to
base unit:
• Attach one end of the
hose to the nozzle
assembly with the
bridge clamp
Assembly Instructions
• Slide the other end of the hose over the edge of the
inlet on the front plate
• Hook one side of the nozzle bracket over the front axle
• Bend the other end of the nozzle bracket inward to
hook it over the axle and engage the pins on the wheel
bracket with the slots on the nozzle bracket
• Secure the hose to front plate inlet with the bridge
clamp
• Attach the nozzle cable end fitting through the hole in
the nozzle bracket
6. To remove nozzle assembly (for purposes of storage, or
clearing blockages):
• Turn engine off and disconnect spark plug
• Loosen hose clamp on the front plate with flathead
screwdriver or 5/16 wrench
• Slide hose off of front plate inlet
• Bend one side of nozzle bracket inward and twist the
assembly to remove the hook from the axle
• Twist back and lift to remove the other side of nozzle
bracket from the axle
WARNING DANGER
NEVER RUN OR OPERATE YOUR MACHINE
UNLESS DISCHARGE BAG IS ATTACHED,
AND THE INTAKE NOZZLE IS INSTALLED.

7.
7. Speed Controller Setup
1. Attach the Lower Connecting Rod Assembly to the
Lower Bellcrank.
a. Attach Lower Connecting Rod Assembly to the
Lower Bellcrank with a 3/8”-24 Nyloc Nut.
Tighten using 9/16” and 1/2” wrenches.
2. Setup the Speed Controller Mechanism – Critical for
proper operation.
a. Verify that the Self-Locking Acorn Nut is
tightened sufficiently to hold the Upper
Connecting Rod Assembly firmly in place. If not,
slightly tighten the Self-Locking Acorn Nut.
b. Verify the Actuator reversing function by
depressing the Reversing Lever (Red) and then
releasing it. It should work smoothly and, when
released, it should fully return to the “normal”
position.
c. If the Actuator does not work smoothly, binds up,
or does not fully return to the “normal” position,
loosen the Self-Locking Acorn Nut slightly and
recheck the operation. Repeat as needed to achieve
proper operation.
d. Depress the Reversing Lever and then press lightly
on the Bail Handle until the Front Face of the Rear
Slot on the Bail Handle just touches the Actuator
Pin (also refer to picture in step ‘e’ below).
e. The Front Face of the Rear Slot and the Actuator
Pin Bushing should be in contact with each other
and appear as shown below:
f. If the Actuator Pin does not enter into the Rear
Slot as show below, the Upper Connecting Rod
Assembly is too short and must be lengthened.
i. Remove the nut that holds the Rod End to the
Upper Bellcrank.
ii. Disconnect the Rod End from the Upper
Bellcrank.
iii. Adjust the Rod End outwards by unscrewing it
counterclockwise.
iv. Reattach the Rod End to the Upper Bellcrank
and secure it with the nut (hand tightened).
v. Repeat this adjustment as needed to position
the Rear Slot and Actuator Pin as shown in
step ‘e’ above.

B. Put Oil and Gasoline in Engine
Before Starting
1. Little Wonder recommends using SAE 30 Oil. The use of
multi-viscosity oil will result in high oil consumption and
possible engine damage.
2. Add gasoline to the fuel tank, and you are ready to start.
3. See Engine Operating & Maintenance instructions for
more detail description of type and amount of oil and
gasoline used.
WARNING DANGER
HANDLE FUEL WITH CARE. IT IS HIGHLY
FLAMMABLE. FUELING A HOT ENGINE OR NEAR
AN IGNITION SOURCE CAN CAUSE A FIRE AND
RESULT IN SERIOUS PERSONAL INJURY AND/ OR
PROPERTY DAMAGE.
8.
g. If the Actuator Pin enters into the Rear Slot as
show below, the Upper Connecting Rod Assembly
is too long and must be shortened.
i. Remove the nut that holds the Rod End to the
Upper Bellcrank.
ii. Disconnect the Rod End from the Upper
Bellcrank.
iii. Adjust the Rod End inwards by screwing it
clockwise.
iv. Reattach the Rod End to the Upper Bellcrank
and secure it with the nut (hand tightened).
v. Repeat this adjustment as needed to position
the Rear Slot and Actuator Pin as shown in
step ‘e’ above.
h. While holding the Reversing Lever down,
gradually press down on the Bail Handle. The
Actuator Pin should engage the Rear Slot smoothly
with minimal or no “snapping” action when the
Bail Handle is depressed. It may be necessary to
readjust the Rod End as described above to fine-
tune this action.
i. Release the Bail Handle. It should return to its full
upright position and the Actuator Assembly should
also return to its “normal” position as shown below:
j. Depress the Bail Handle and verify that the
Actuator Pin smoothly engages the Front Slot on
the Bail Handle.
k. Verify the forward and reverse operations several
times to assure that the set up is correct.
l. Lock the Rod End of the Upper Connecting Rod
Assembly by holding the Rod End in position with
a 1/2” wrench and then tightening the nut with a
9/16” wrench as shown below:
m. Verify that Rod End is straight and not cocked as
depicted below:
n. Remove the standard 3/8”-24 Nut from the Rod
End of the Upper Connecting Rod Assembly and
replace it with the 3/8”-24 Nyloc Nut. Tighten
using both a 9/16” & 1/2” wrench.
Setup of Speed Controller complete.

9.
Operation
WARNING DANGER
THE OPERATOR OF THIS HIGH PERFORMANCE
VAC IS RESPONSIBLE FOR ACCIDENTS OR
HAZARDS OCCURRING TO HIMSELF, OTHER
PEOPLE OR THEIR PROPERTY.
A. Starting Instructions
1. Perform pre-starting checks (engine oil and gas level, all
safety inspections, etc. Read entire Owners’ Manual for all
pre-starting information.)
2. Release the Transaxle Engagement Lever
3. Make sure Gas Supply Knob (located above Recoil
Starter) is turned to On position.
4. Move Choke Lever (located above and to the left of the
Recoil Starter) to Choke position.
5. Move Throttle Control Lever (located on Left Handlebar)
to Middle Position or Full Position (toward Rabbit symbol.)
6. Pull Recoil Starter Handle slowly until resistance is felt,
then pull firmly to start engine.
7. When engine starts, slowly move Choke Lever to
Open position.
8. Increase Throttle Control Lever to Full Speed if desired.
9. NOTE: If engine is difficult to start: Press Belt Tension
Lever down with your left foot before pulling Recoil
Starter Handle. (This disengages the belt for easier
starting.) When engine starts, slowly release your foot
from the Belt Tension Lever.
WARNING DANGER
DO NOT USE OR SERVICE THE UNIT WHEN IT’S
SUSPENDED FROM THE LIFTING LUG.
WARNING DANGER
FUEL IS EXTREMELY FLAMMABLE. HANDLE IT
WITH CARE. KEEP AWAY FROM IGNITION
SOURCES. DO NOT SMOKE WHILE FUELING
YOUR EQUIPMENT.
B. Self-Propelled Instructions
1. With engine running (and Transaxle Lever in Engage
position) slowly press Bail Handle downward to self-
propel vacuum FORWARD. The farther down you press
the Bail Handle, the faster the speed of the vacuum.
Slowly release the Bail Handle to reduce speed or to stop.
2. To self-propel in Reverse, first press downward on the
Reverse Lever, and (with the Reverse Lever pressed
down) press downward on the Bail Handle. The farther
down you press the Bail Handle, the faster the speed of
the vacuum in REVERSE. Slowly release the Bail Handle
to reduce speed or to stop.
3. Releasing the Bail Handle at any time stops the vacuum
from movement.
C. Use of Lifting Lug
Little Wonder High Performance Vac is supplied with convenient
Lifting Lug that can be used when you need to move or tie down
the unit.
RECOIL STARTER HANDLE
tension when starting
BELT TENSION LEVER
Step on to release belt
CHOKE LEVER
THROTTLE CONTROL LEVER
REVERSE LEVER
Release to engage
Press to engage
GAS SUPPLY KNOB
Pull and latch to disengage
reverse mode
TRANSAXLE ENGAGEMET LEVER
BAIL HANDLE
Press to propell
HPV forward or reverse
NOZZLE CONTROL
KNOB
BAND CLAMP
CLASP
WARNING DANGER
ENGINE EMITS CARBON MONOXIDE. DO NOT
OPERATE OR REFUEL IN ENCLOSED AREA.
HPV Control Levers

10.
WARNING DANGER
KEEP RECOIL STARTER SCREEN AND ENTIRE
ENGINE CLEAR OF ALL DEBRIS. DO NOT
OPERATE ENGINE WITH AN ACCUMULATION OF
GRASS, DIRT, LEAVES OR OTHER
COMBUSTIBLE MATERIAL NEAR MUFFLER.
WARNING DANGER
DO NOT OPERATE UNIT IF EXCESSIVE
VIBRATION OCCURS; SHUT ENGINE OFF
IMMEDIATELY! REMOVE SPARK PLUG WIRES
AND CHECK FOR DAMAGED IMPELLER,
LOOSE IMPELLER BOLT, LOOSE IMPELLER KEY,
OR LODGED FOREIGN OBJECTS.
C. Vacuuming
1. Adjust nozzle to desired height by turning the nozzle
control knob, secure position with wing nut.
2. Vacuum debris from lawn or paved surfaces. Vacuum the
following: leaves, small twigs and sticks, acorns, thistles,
seed pods, grass clippings, straw, wood chips, dry mulch,
litter, small cans & bottles, paper products, styrofoam
products.
3. Avoid the following: excessively wet surfaces and debris,
gravel surfaces, large hard objects, rocks, long fibrous
materials (vines, rope, string etc). Do not force anything
into vacuum.
D. Empty Debris Bag
1. Turn off engine and let it come to a complete stop before
removing the debris bag.
2. Roll vacuum to the desired unloading location
(compost pile, curb-side, wooded area, tarp, etc.).
3. Open clasp on band clamp to release bag to the ground.
Avoid dragging bag on surface to prolong bag life.
4. Empty contents of debris bag (handle straps are provided
on the under side of the bag for aid in dumping contents).
5. Reconnect bag to collector.
E. Refueling the Engine
1. Stop engine and allow it to cool for a few minutes before
refueling.

11.
After First
8 Hrs of Use

Every
Use






Every
5 Hrs


Every
25 Hours

Every
50 Hours




Area
*Engine
Check muffler area for
accumulation of debris
Check for excessive vibration
Inspect for loose or damaged parts
Inspect for clean intake nozzle
Inspect labels condition
Check oil level
**Oil change
Service air cleaner
Clean and inspect spark plug
arrester
Check tire pressure
Inspect speed control for proper
operation
Check V Belt for excessive wear,
cracks, etc.
Check idler pulleys for smooth
operation
See Engine Manual
* See Engine Operating & Maintenance instructions for more detail maintenance and service schedule.
** Change oil every 25 Hrs if operating under heavy load or high ambient temperature.
Storage and Maintenance
A. Storage
1. After each use, run HPV with the empty bag attached to help clear out any loose material in the housing.
2. When not in use store High Performance Vac in sheltered area (a dry place) not accessible to children. Keep throttle
in the “Stop” position.
3. The High Performance Vac, as well as fuel, should not be stored in a house or poorly ventilated areas.
4. Do not store fuel in the engine’s gas tank longer than 30 days.
B. Maintenance

12.
D. Directions for removing the Fan
and reinstallation
1. Remove spark plug wire from spark plug.
2. Remove nozzle assembly.
3 Remove front plate assembly.
4. Remove the bolt that secures the fan to the engine
crankshaft.
5. The fan has a 3/4-16 nut welded on the fan hub. Insert a
3/4-16 x 5" long grade 5 (or better) bolt and jack or push
the fan off the engine. (Little Wonder P/N 910505 pressure
screw is recommended.)
WARNING DANGER
TURN OFF ENGINE BEFORE YOU DISCONNECT
HOSE, AND MAKE SURE ALL MOVING PARTS
COME TO A COMPLETE STOP.
WARNING DANGER
BE SURE THROTTLE IS IN “STOP” POSITION, AND
FAN HAS COME TO A COMPLETE STOP.
WARNING DANGER
DISCONNECT THE SPARK PLUG WIRES BEFORE
ANY CLEANING OR MAINTENANCE!
WARNING DANGER
WEAR GLOVES, THE CLOG MAY CONTAIN
SHARP MATERIALS.
C. Removing Blockage in Moving Parts
1. Support the housing with 2x4 lumber such that front wheel
are 1” above the ground.
2. Chock the rear wheels with blocks.
3. Remove the nozzle assembly from the front plate.
(See Assembly Instruction 6.)
4. Remove the front wheel assembly.
5. Remove the front plate.
6. Wear gloves and clear out debris from around the impeller
and housing.
6. Replace damaged or worn fan with a new one. If during
fan removal the key (#915) was removed from the keyway,
reinstall it by applying a few drops of the Loctite 380
instant adhesive (“Black Max” P/N 38050) on the key, and
load the key in the keyway of the shaft. (Cure time is
approx. 1 min.)
7. Use a new bolt (#600524) (add Loctite 242 to new bolt)
and washer (#910527) and complete fan installation.
Insure a secure fit upon re-assembling. Torque bolt to
39-51 Ft. lbs.
E. Changing V-Belt
1. Turn off engine. Remove Spark Plug Wire from Spark
Plug. Chock or block wheels of vacuum to prevent it
from rolling.
2. Remove Debris Bag from vacuum.
3. Remove 3 hex head bolts that attach Belt Guard to
Deck. (Use 7/16” wrench or socket.) Set Belt Guard aside.
Note how V Belt goes around each of 4 pulleys and how
it “twists.”
4. Remove 4 hex head bolts that attach Recoil Starter Cover
to Engine Standoffs. (Use 8 millimeter nut driver, socket or
wrench.) Remove Recoil Starter Cover.
5. Loosen (but do not remove) 2 hex head bolts that attach
Fixed Idler Bracket to Deck. (Use 7/16” wrench or socket.)
This allows clearance for belt to be removed.
6. Press down on Belt Tension Lever and lift V Belt off its
pulley. Release Belt Tension Lever. Remove V Belt from
Engine Pulley.
7. Remove V Belt from large horizontal pulley of transaxle
(under Deck.) Pushing V Belt forward with both hands,
then lifting V Belt up, then pulling V Belt backwards
should remove it from large pulley. Remove V Belt from
under Deck.
8. Reverse above steps to replace V Belt. Install V Belt with
the same “twists” that the old V Belt made around the
pulleys. Make sure the “V” side of the V Belt goes into
each pulley. Before replacing Belt Guard or starting
engine, pull Recoil Starter Handle several times to make
sure V Belt rides in the grooves of each pulley.
9. Make sure Belt Tension Lever and return spring operate
smoothly. If it sticks or does not operate smoothly,
lubricate the Belt Tension Lever and its mounting bracket
with a few drops of Motor Oil, or other medium weight
oil. Push Belt Tension Lever down and release it several
times to allow lubrication to penetrate between lever and
mounting bracket. Proper operation of the Belt Tension
Lever and its return spring will insure that your V Belt
will operate properly and last many hours of use.

13.
1
4
4x
35
44 4x
46
2
53
4x
4x
31
15
3
31
59
23
21
34
51
43
4x
4x
4x
64
58
48
57
20
CONNECT TO ENGINE
THROTTLE LEVER
45
47
18
19 45
52
2x
2x
46
4x
7
42
33
8
49
40
4x
50
9
52
45
6x
17
16
17
30 14
11
14
63
4x
60 61 62
46
6x
6
22
37
36
54
3x
3x
55 32
56
55
32
15
38
41
56
39
25
46
46
394x
4x
46
29
13 4x
10
5
29 30
12
12
25 28 24
26
HPV Parts Assembly

14.
KEY NO.PART NO.DESCRIPTION QTY.
1 SEE DETAIL 6.5 HP ENGINE ASSEMBLY 1
2 SEE DETAIL DECK ASSEMBLY 1
3 600193 TRANSAXLE 1
4 600184 HANDLE MOUNT 1
5 600251 BELT GUARD 1
6 600186 HOUSING - WITH OUT LINER HOLES 1
7 600187 HOUSING - WITH LINER HOLES 1
8 600114 IMPELLER-BALANCED 1
9 600118 FRONT PLATE 1
10 600182 BRACKET, FRONT WHEELS 1
11 600188 AXLE, FRONT 1
12 600137 SPACER, WHEEL 2
13 600257 WEIGHT DISC 4
14 934 WHEEL, 10" 2
15 600195 WHEEL, 13" 2
16 600102 HOSE, NOZZLE, 7"D x 10" LG 1
17 720420 BRIDGE CLAMP, HOSE, 7" D 2
18 600162 KNOB, NOZZLE CONTROL, 5/16-18,
FEMALE 1
19 600104 NOZZLE CONTROL CABLE 1
20 600239 THROTTLE CABLE CONTROL LV
w/ Trans 1
21 600176 BAND CLAMP 1
22 600196 BAG SEAL STRAP 1
23 600177 DEBRIS BAG 1
24 600220 LEVER, DISCONNECT, LV TRANS 1
25 600252 SPRING HANGER 1
26 600548 HAIR PIN, 1/4" SHAFT 1
25 600555 PIN, CLEVIS, 1/2" x 1-1/2" LG 1
28 600556 PIN, HITCH 1
29 600258 COLLAR, 5/8 2
30 312 SNAP RING, 5/8D 2
31 600540 E CLIP 2
32 920532 KEY 3/16 x 3/16 x 1-1/2" LG 2
33 915 KEY, 1/4" SQ x 2" LG 1
KEY NO.PART NO.DESCRIPTION QTY.
34 600504 BOLT, CARRIAGE, 3/8-16 x 2-1/4, GR.5 4
35 600525 BOLT, CARRIAGE, 3/8-16 x 2" LG 4
36 600537 BOLT, HEX, 1/4-20 x 3/4" LG 3
37 600545 BOLT, HEX, 1/4-20 x 2.5" LG 1
38 942 BOLT, HEX, 5/16-18 x 1-3/4"LG 4
39 600547 BOLT, HEX, 5/16-18 x 2-1/4"LG 5
40 600524 BOLT, 3/8-24 x 1.75" LG 1
41 600546 BOLT, SELF TAP, 5/16-8 x 3/4" LG 1
42 910503 BOLT, SERRATED FLANGE,
5/16-24 x 3/4" LG 4
43 720518 NUT, NYLOCK, 3/8-16 4
44 720594 NUT, SERRATED FLANGE, 3/8-16 4
45 114C NUT, NYLOCK, 5/16-18 9
46 114B NUT, SERRATED FLANGE, 5/16-18 15
47 600507 NUT, WING, 5/16-18 1
48 600506 NUT, NYLOCK, 1/4-20 1
49 910527 WASHER, FAN, FLANGED 1
50 600523 WASHER, 5/16 ID x 3/16 TH 2
51 720516 WASHER, FLAT, 3/8, USS 4
52 720511 WASHER, FLAT, 5/16, USS 8
53 129D WASHER, SPLIT LOCK, 5/16 4
54 600554 WASHER, LOCK, STAR, EXT, 1/4" 3
55 600269 WASHER, THRUST,
OILITE 3/4" ID x 1-1/4" OD x 1/16" TH 2
56 600268 WASHER, THRUST,
OILITE 3/4" ID x 1-1/4" OD x 1/8" TH 6
57 600518 WASHER, 1/4", COLLECTOR 1
58 720411 CABLE TIE, 7.5" 2
59 600521 HARDWARE BAG 1
60 16-102 WARRANTY CARD 1
61 600709 OWNERS MANUAL 1
62 N/A ENGINE MANUAL 1
63 SEE DETAIL NOZZLE ASSEMBLY 1
64 SEE DETAIL COLLECTOR ASSEMBLY 1
HPV Parts List

15.
HPV Deck Assembly
HPV Engine Assembly
1
5
7
8
3
6
2
44x
4x
KEY NO. PART NO. DESCRIPTION QTY.
1 600901 ENGINE, 6.5 HP 1
2 600901 RECOIL, SUPPLIED W/ ENGINE (600901) 1
3 600901 NUT, SUPPLIED W/ ENGINE (600901) 1
4 600901 BOLT, SUPPLIED W/ ENGINE (600901) 4
5 600194 PULLEY, ENGINE 1
6 600249 STANDOFF , ENGINE 4
7 600200 BELT, V, LV W/ TRANS 1
8 600238 KEY, ENGINE PULLEY 1
KEY NO. PART NO. DESCRIPTION QTY.
1 600199 DECK, LV W/ TRANS 1
2 600231 BELLCRANK, DECK 1
3 600244 BRACKET, BELLCRANK, DECK 1
4 600264 BRACKET, IDLER, WELDMENT 1
5 600266 LINK, BELLCRANK, WELDMENT 1
6 600219 STRAP, TORQUE, LV 1
7 600204 BRACKET, MOUNT, TENSION 1
8 600203 BRACKET, TENSION 1
9 600555 PIN, CLEVIS, 1/2" X 1-1/2" LG 1
10 600556 PIN, HITCH 1
11 600270 BUSHING, FLANGED, 1/2" ID X 5/8" OD X 1/2" LG 2
12 600224 PULLEY, IDLER, LV 2
13 600201 BEARING, NEEDLE, 1/2" ID X 11/16" OD 4
14 600253 SPRING, PULLEY, IDLER 1
15 600526 BOLT, SHOULDER, 1/2" X 1-1/4" LG 3
16 600537 BOLT, HEX, 1/4-20 X 3/4" LG 6
17 129C BOLT, HEX, 5/16-18 X 3/4" LG 1
18 600536 BOLT, SHOULDER, 3/8" X 3/8" LG 1
19 114B NUT, SERRATED FLANGE, 5/16-18 2
20 600541 NUT, THIN JAM, 3/8-16 3
21 600554 WASHER, LOCK, STAR, EXT, 1/4" 6
22 600558 SHIM, SHOULDER BOLT, 1/2" OD X .015 TH 2
23 600557 WASHER, BELVILLE SPRING 3/8 ID X 5/8 OD 2

16.
KEY NO. PART NO. DESCRIPTION QTY.
1 600101 DISCHARGE COLLECTOR 1
2 600130 HANDLE 1
3 600142 FLANGE CLAMP PLATE 1
4 600138 FLANGE ANGLE-COLLECTOR 1
5 600242 BRACKET, BELLCRANK, HANDLE 1
6 600206 BELLCRANK, HANDLE 1
7 600215 BAIL HANDLE 1
8 600211 REVERSE LEVER 1
9 600271 CAP, REVERSE LEVER 1
10 600161 HOOK STRIP 1
11 600605 WARNING LABEL - DEBRIS BAG 1
12 600260 SPRING, RETURN CONTROL 1
13 600237 SPRING, TORSION, BAIL 1
14 600210 ROD, CONTROL, UPPER 1
15 600209 ROD, CONTROL, LOWER 1
16 20950 SWIVEL ASSEMBLY 3/8-24 3
17 600552 BOLT, HEX, 1/4-20 X 2" LG 2
18 600545 BOLT, HEX, 1/4-20 X 2.5" LG 3
19 600544 BOLT, HEX, 5/16-18 X 2"LG 1
20 600543 BOLT, HEX, 5/16-18 X 3.5"LG 1
21 600551 BOLT, SHOULDER, 5/16 DIA X 3/8" LG 1
22 600506 NUT, NYLOCK, 1/4-20 6
23 114C NUT, NYLOCK, 5/16-18 2
24 600542 NUT, NYLOCK, 3/8-24, YELLOW ZINC 3
25 114B NUT, SERRATED FLANGE, 5/16-18 2
26 600528 NUT, THIN JAM, 3/8-24 5
27 600549 NUT, ACORN, 1/4-20, SELF LOCKING 1
28 600550 NUT, ACORN, 3/8-24, SELF LOCKING 1
29 600518 WASHER, 1/4", COLLECTOR 7
30 396 WASHER, LOCK, 1/4", SPLIT 1
31 720510 WASHER, FLAT, 1/4, USS 5
32 720511 WASHER, FLAT, 5/16, USS 6
33 600259 BUSHING, ACTUATOR 1
34 600246 BUSHING, FLANGED, DRYLIN MFI-0608-04 2
35 600262 SPACER, OILLITE, 1/4" ID X 3/8" OD X 3/8" LG 2
36 600241 BUSHING, FLANGED, OILLITE, 5/16 ID X 7/16 OD X3/8" LG 2
37 600263 SPACER, OILLITE, 5/16" ID X 3/8" OD X 3/8" LG 1
38 600256 SPACER, OILITE, 5/16 ID X 5/8 OD X 1.25" LG 2
HPV Collector Assembly

17.
HPV Liner Assembly
KEY NO. PART NO. DESCRIPTION QTY.
1 600187 HOUSING ASSEMBLY, WITH LINER HOLES 1
2 600175 LINER 1
3 720592 FLANGE BOLT, 5/16-18 X 1" LG 10
4 720511 WASHER, FLAT, 5/16, USS 10
5 114C NUTS, NYLOCK, 5/16-18 10
KEY NO. PART NO. DESCRIPTION QTY.
1 600100 NOZZLE 1
2 600133 NOZZLE CLAMP PLATE ASSEMBLY 1
3 600183 NOZZLE BRACKET, VER. 2" 1
4 114B NUT, SERRATED FLANGE, 5/16-18 3
HPV Nozzle Assembly
(MODELS 5611 & 5631 ONLY)

LITTLE WONDER®
DIVISION OF SCHILLER-PFEIFFER, INCORPORATED
1028 STREET ROAD, P.O. BOX 38
SOUTHAMPTON, PA 18966
PHONE [phone] • FAX [phone]
www.littlewonder.com
Specifications, descriptions, and illustrative material in this literature are as accurate as known at the time of publication, but are subject to change without notice.
P/N 600709
10/05
877-LWONDER
1 YEAR LIMITED SERVICE & WARRANTY POLICY
FOR HIGH PERFORMANCE VAC
The Little Wonder High Performance Vac is guaranteed against defects in material
and workmanship for a period of ONE YEAR from date of purchase, when used for
RESIDENTIAL SERVICE, or COMMERCIAL SERVICE. Any
Little Wonder High
Performance Vac or part found to be defective within the warranty period is to be returned
to any registered Little Wonder Dealer.
Engines for all gasoline powered products are warranted separately by the engine
manufacture for a period of one year. Therefore, there are no warranties made, expressed or
implied, for engines of gasoline powered products by
Little Wonder .
Transportation charges for parts and units submitted for replacement under this warranty
must be borne by the purchaser.
THIS WARRANTY shall not be effective if the product has been subject to misuse,
negligence or accident, or if the product has been repaired or altered outside of our
Southampton factory in any respect which affects its condition or operation.
Little Wonder shall not be liable for any special indirect or consequential damages
arising from defective equipment. Any implied warranty, including merchantability of
fitness for a particular purpose, shall not extend beyond the written warranty period.
THIS WARRANTY shall only be effective if the enclosed Warranty/Registration card is
properly filled out and returned to
Little Wonder , Div. of Schiller-Pfeiffer, Inc. at time
of purchase.
WARNING DANGER
THE ENGINE EXHAUST FROM THIS PRODUCT
CONTAINS CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.