Advance acoustic Captor 4300 User manual

4/04 revised 2/09 Form Number 56043094
Captor™4300, 4800, 5400
MECHANICAL REPAIR SERVICE MANUAL
Obsolete Advance MODELS 56304000, 56304001, 56304002, 56304003, 56304004,
56304005, 56304006, 56304007, 56304008
Active Advance MODELS 56306050, 56306051, 56306052, 56306053, 56306054,
56306055, 56306056, 56306057, 56306058, 56307251
56306182, 56306183, 56306184, 56306185, 56306186, 56306187, 56306188,
56306189, 56306190
All model numbers starting with “56306” and “56307” are manufactured with the
2007 certified engine.

52 - FORM NO. 56043094 / Captor™4300, 4800, 5400
GENERAL INFORMATION.............................................................................................................................2-3
SAFETY INSTRUCTIONS.................................................................................................................................4
KNOW YOUR MACHINE................................................................................................................................5-6
OPERATOR’S COMPARTMENT....................................................................................................................7-8
STEERING SYSTEM.................................................................................................................................... 9-11
STEERING WHEEL REMOVAL.......................................................................................................................9
HYDRAULIC STEERING UNIT REMOVAL.....................................................................................................9
HYDRAULIC STEERING CYLINDER REMOVAL ......................................................................................... 10
WEAR ADJUSTMENT FOR CYLINDER RACK ............................................................................................10
STEERING SPINDLE ASSEMBLY REMOVAL.............................................................................................. 10
BEARING REPLACEMENT AND SPINDLE INSTALLATION........................................................................10
WHEEL DRIVE SYSTEM ...........................................................................................................................12-13
DRIVE TIRE REMOVAL ................................................................................................................................12
WHEEL DRIVE MOTOR REMOVAL..............................................................................................................12
HYDROBACK DRIVE PEDAL NEUTRAL ADJUSTMENT............................................................................. 13
HYDROBACK CABLE ASSEMBLY REMOVAL.............................................................................................13
FRONT WHEEL SYSTEM ..........................................................................................................................14-15
FRONT WHEEL REMOVAL AND BRAKE INSPECTION..............................................................................14
FRONT BRAKE SHOE ADJUSTMENT ......................................................................................................... 14
BRAKE CABLE REPLACEMENT..................................................................................................................14
HYDRAULIC SYSTEM ...............................................................................................................................16-23
REMOVAL OF HYDRAULIC OIL COOLER...................................................................................................16
REMOVAL OF ENGINE COOLANT RADIATOR ...........................................................................................16
REMOVAL OF HYDRAULIC ENGINE FAN MOTOR..................................................................................... 16
ACCESSORY PUMP ASSEMBLY REMOVAL...............................................................................................18
PROPULSION PUMP REMOVAL.................................................................................................................. 18
HYDRAULIC HOSE ROUTING ................................................................................................................20-21
HYDRAULIC SCHEMATIC 43” MODELS......................................................................................................22
HYDRAULIC SCHEMATIC 48” MODELS......................................................................................................23
HYDRAULIC SCHEMATIC 54” MODELS......................................................................................................24
SWEEPING SYSTEM.................................................................................................................................26-34
MAIN BROOM MAINTENANCE....................................................................................................................26
BROOM LEVER SWITCH S16 REPLACEMENT AND ADJUSTMENT.........................................................27
MAIN SWEEPING BROOM MOTOR REMOVAL .......................................................................................... 27
SIDE BROOM MAINTENANCE..................................................................................................................... 28
SIDE BROOM MOTOR REMOVAL ...............................................................................................................29
SIDE BROOM LIFT ACTUATOR MOTOR REPLACEMENT.........................................................................30
SIDE BROOM LIFT ACTUATOR MOTOR ADJUSTMENT............................................................................31
SKIRT IDENTIFICATION AND REPLACEMENT...........................................................................................32
SWEEPING PERFORMANCE CHECK LIST ................................................................................................32
IMPELLER MOTOR REMOVAL ....................................................................................................................33
MAIN BROOM LIFT CABLE REPLACEMENT.........................................................................................33-34
HOPPER SYSTEM.....................................................................................................................................35-37
SEALS AND SKIRTS IDENTIFICATION AND REPLACEMENT ...................................................................35
DUMP DOOR CYLINDER REMOVAL...........................................................................................................36
HOPPER LIFT CYLINDER REMOVAL..........................................................................................................37
TABLE OF CONTENTS
revised 1/06

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 1
TABLE OF CONTENTS
SOLUTION SYSTEM..................................................................................................................................38-39
SOLUTION TANK REMOVAL........................................................................................................................38
SOLUTION VALVE CONTROL CABLE REPLACEMENT .............................................................................38
TROUBLESHOOTING GUIDE ......................................................................................................................38
SOLUTION SYSTEM MAINTENANCE ......................................................................................................... 38
SCRUBBING SYSTEM...............................................................................................................................40-41
SCRUB DECK ASSEMBLY REMOVAL.........................................................................................................40
SCRUB DECK ASSEMBLY INSTALLATION .................................................................................................40
SCRUB DECK CYLINDER REMOVAL..........................................................................................................40
SCRUB BRUSH MOTOR REMOVAL............................................................................................................40
RECOVERY SYSTEM................................................................................................................................42-43
TROUBLESHOOTING GUIDE ......................................................................................................................42
VACUUM/RECOVERY SYSTEM SERVICE MAINTENANCE CHECKLIST..................................................42
RECOVERY TANK REMOVAL ...................................................................................................................... 42
VACUUM FAN MOTOR REPLACEMENT .....................................................................................................43
SQUEEGEE SYSTEM................................................................................................................................44-47
SQUEEGEE MAINTENANCE .......................................................................................................................44
REMOVAL OF SQUEEGEE MOUNT ASSEMBLY ........................................................................................46
SQUEEGEE LIFT CYLINDER REMOVAL.....................................................................................................46
ELECTRICAL SYSTEM..............................................................................................................................48-49
A1 MAIN CONTROL BOARD REMOVAL ......................................................................................................48
ENGINE DISABLED ECM REMOVAL......................................................................................................48-49
ENGINE SYSTEM ..............................................................................................................................................*
Note: All references to right, left, front, or rear in this manual are as seen from the operator’s stand-point.
*See OTHER MANUALS AVAILABLE for list of available engine information.
revised 1/06

2- FORM NO. 56043094 / Captor™4300, 4800, 5400
INTRODUCTION
This manual will help you get the most from your Advance rider scrubber sweeper. Read it thoroughly before servicing the machine.
Note: Bold numbers and letters in parentheses and underlined indicate an item illustrated on pages 5-6 i.e. (B).
This product is intended for commercial use only.
PARTS AND SERVICE
Repairs, when required, should be performed by your Authorized Advance Service Center, who employs factory trained service personnel,
and maintains an inventory of Advance original replacement parts and accessories.
Call the ADVANCE DEALER named below for repair parts or service. Please specify the Model and Serial Number when discussing your
machine.
(Dealer, affix service sticker here.)
NAME PLATE
The Model Number and Serial Number of your machine are shown on the Nameplate on the machine. This information is needed when
ordering repair parts for the machine. Use the space below to note the Model Number and Serial Number of your machine for future
reference.
MODEL NUMBER
SERIAL NUMBER
HOPPER SAFETY SUPPORT
WARNING!
Make sure the Hopper Safety Support (KK) is in place whenever attempting to do any maintenance work under or near the
raised hopper. The Hopper Safety Support (KK) holds the hopper in the raised position to allow work to be performed under
the hopper. NEVER rely on the machine’s hydraulic components to safely support the hopper.
JACKING THE MACHINE
CAUTION!
Never work under a machine without safety stands or blocks to support the machine.
• When jacking the machine, do so at designated locations (Do Not jack on the hopper) – see jacking locations (44).
TRANSPORTING THE MACHINE
CAUTION!
Before transporting the machine on an open truck or trailer, make sure that…
• The machine is tied down securely - see tie-down locations (6).
•All access doors and covers are secured (tape and strap as necessary).
•The machine parking brake is set.
GENERAL INFORMATION

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 3
TOWING OR PUSHING A DISABLED MACHINE
The machine’s drive propelling pump is manufactured with a tow valve. This valve prevents damage to the hydraulic system when the
machine is being towed/pushed short distances without use of the engine.
To access the valve, open the Engine Compartment Door (22) and lift off the Right Engine Compartment Access Panel (37). Locate the
valve as shown on the underside of the hydrostatic pump by reaching under the radiator. Turn the valve 90 degrees, this disengages the
hydrostatic lock between the motor and pump.
CAUTION!
The hydraulic propelling pump can be damaged if the machine is towed with the valve in the normal working position (A).
Reference the illustrations below for the normal working setting (A) (vertical) and the free wheeling towing setting (B) (horizontal). Note:
If the tow valve is left in free wheeling (B) (horizontal) position the propelling pump can’t drive the machine FWD or REV. No damage will
result, just re-set valve to the normal working setting (A) (vertical). NOTE: Tow or push machine no faster than a normal walking pace (2-3
mph - 3-5 km/h) and for short distances only. If the machine is to be moved long distances the drive wheel needs to be raised off the floor
and placed on a suitable transport dolly.
OTHER MANUALS AVAILABLE
The following manuals are available for your Rider Scrubber/Sweeper:
•Parts List - Form Numbers 56042440 (main parts list)
56042445 (Hydraulic Systems)
56042449 (Options/Accessories)
56042478 (Engine Systems 2007 certified)
•Operation Manual - Form Numbers 56041580 (English, Spanish)
•Quick Start Service Manual 56043093
• Engine Manuals (Tier I)
1.6L Industrial Engine Operator Manual (excerpt from 16LECSS) 56041564
1.6L Industrial Engine Service Manual 36100009*
1.6L Emission Certified Industrial Engine Emission Control System Service Manual 16LECSS*
• Engine Manuals (Tier II)
1.6L Industrial Engine Operator Manual (excerpt from 16LECSS) 56041564
1.6L Industrial Engine Service Manual 36100009*
PSI Tier 2 1.6L PFI Certified Engine Service Manual G/LP PSI1P6LPFI-A*
V1505 Kubota Diesel Engine Service Manual (WSM English) 97897-02432
V1505 Kubota Diesel Engine Service Manual (WSM English, French, German) 97897-01640
V1505 Kubota Diesel Engine Operator Manual (English, French, German, Italian, Spanish) 16622-8916-3
*Available in electronic format only
BOTTOM VIEW OF HYDROSTATIC PUMP
GENERAL INFORMATION

4- FORM NO. 56043094 / Captor™4300, 4800, 5400
CAUTIONS AND WARNINGS
SYMBOLS
Advance uses the symbols below to signal potentially dangerous conditions. Always read this information carefully and take
the necessary steps to protect personnel and property.
DANGER!
Is used to warn of immediate hazards that will cause severe personal injury or death.
WARNING!
Is used to call attention to a situation that could cause severe personal injury.
CAUTION!
Is used to call attention to a situation that could cause minor personal injury or damage to the machine or other property.
GENERAL SAFETY INSTRUCTIONS
Specific Cautions and Warnings are included to warn you of potential danger of machine damage or bodily harm.
DANGER!
• This machine emits exhaust gases (carbon monoxide) that can cause serious injury or death, always provide adequate
ventilation when operating this machine.
WARNING!
• This machine shall be used only by properly trained and authorized persons.
• While on ramps or inclines, avoid sudden stops when loaded. Avoid abrupt sharp turns. Use low speed down hills. Clean
only while ascending (driving up) the ramp.
• Keep sparks, flame and smoking materials away from the battery and fuel system.
• Remove all jewelry when working near electrical components.
• Take precautions to prevent hair, jewelry, or loose clothing from becoming caught in moving parts.
• Turn the key switch off (O), disconnect the battery, and set the parking brake before servicing the machine.
• Never work under a machine without safety blocks or stands to support the machine.
• Do not dispense flammable cleaning agents, operate the machine on or near these agents, or operate in areas where
flammable liquids exist.
• Do not clean this machine with a pressure washer.
• Keep the LP tank Service Valve closed when the tank is not in use.
CAUTION!
• This machine is not approved for use on public paths or roads.
• This machine is not suitable for picking up hazardous dust.
• When operating this machine, ensure that third parties, particularly children, are not endangered.
• Before performing any service function carefully read all instructions pertaining to that function.
• Do not leave the machine unattended without first turning the key switch off (O), removing the key and applying the
parking brake.
• Turn the key switch off (O) before changing the brushes, and before opening any access panels.
• Use caution when moving this machine in below freezing temperature conditions. Any water in the solution or recovery
tanks or in the hose lines could freeze, causing damage to valves and fittings. Flush with windshield washer fluid.
• The battery must be removed from the machine before the machine is scrapped. The disposal of the battery should be
safely done in accordance with your local environmental regulations.
SAVE THESE INSTRUCTIONS

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 5
1 Operator’s Seat
2 Strobe Light (optional)
3 Solution Tank Fill
4 Gasoline Tank Cap
5 Fuel Tank
6 Tie Down Locations
7 Recovery Tank Drain Hose
8 Engine Air Filter
9 Left Engine Compartment Access Panel
10 Main Broom Left Access Door
11 Battery
12 Hopper Lid Prop Rod
13 Front Wheel
14 Left Side Broom
15 Hopper Lid Latch
16 Headlights
17 Right Side Broom
18 Hopper Cover
19 Dust Control Filter
20 Dust Control Shaker Assembly
21 Shaker Assembly Latch
KNOW YOUR MACHINE
1
2
3
4
5
6
7
98
10
6
13
14
15
16
17
18
19
20
21
12
22
23
24
44
46
47
45
48
49

6- FORM NO. 56043094 / Captor™4300, 4800, 5400
22 Engine Compartment Door
23 Coolant Recovery Tank
24 Steering Wheel
25 Squeegee Handle
26 Squeegee Tool Assembly
27 Tail Light
28 Exhaust Tail Pipe
29 Fuel Tank Compartment Door
30 Recovery Tank Lid
31 Recovery Tank “Tip-Out” Grip
32 Engine Air Filter Hood
33 Radiator Cap
34 Oil Cooler “Tip-Out” Latches
35 Hydraulic “Charge” Oil Filter
36 Hydraulic Reservoir / In Tank Return Oil Filter
37 Right Engine Compartment Access Panel
38 Main Broom Right Access Door
39 Access Door Latch
40 Skirt Assembly
41 Inline Solution Filter
42 Solution Tank Drain Hose
43 Rear Roller Bumper
44 Jacking Location
45 Engine Oil Dipstick
46 Air Filter Service Indicator
47 Fuel Filter (Gas Models)
48 Recovery Tank Latch
49 Hydraulic Reservoir Access Panel
50 Water Level Gauge
51 Operator Seat Adjustment Lever
KNOW YOUR MACHINE
26 25
27
28
29
30
31 32
33 34 35
36
6
37
38
39
40
41
42
6
43
44
11
50
51

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 7
A Low Fuel Indicator (LP)
B Horn Switch
* Horn ON Indicator
C Engine Service Indicator (triggered by ECU)
D Headlight Switch
* Headlight ON Indicator
E Glow Plug Indicator (Diesel / Release key after indicator turns OFF)
F Hydraulic Filter Plugged Indicator
G Engine Speed Switch
* Engine Speed Switch Indicator
H Scrub Pressure Decrease Switch
* Scrub Pressure Decrease Indicator
I Scrub Pressure Increase Switch
* Scrub Pressure Increase Indicator
J Scrub Pressure Display
K Solution Switch
* Solution System Indicator
L Solution Tank Empty Indicator
M Recovery Tank Full Indicator
N Side Broom DOWN/ON Switch
* Side Broom ON Indicator
O Main Broom ON Indicator
OPERATOR'S COMPARTMENT
TEMP
F/C
VOLTSFUEL
OIL
PSI/BAR
HOURS 1/10
250
175
120
50
75
100
100
50
0
1
3
8
F
E
1/2
18
13
10
+
-
AB
C
D
E
FG
BB
CC
DD
EE
I
J
H
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
PP

8- FORM NO. 56043094 / Captor™4300, 4800, 5400
P Light Sensor
Q Shaker Switch
* Shaker Indicator (left)
* Dust Filter Plugged Indicator (right)
R Open Dump Door Switch
* Open Dump Door Indicator
S Hopper Open Indicator
T Hopper Overtemp Indicator
U Close Dump Door Switch
* Close Dump Door Indicator
V Lower Hopper Switch
* Lower Hopper Indicator
W Raise Hopper Switch
* Raise Hopper Indicator
X Dust Control Switch
* Dust Control ON Indicator
Y Side Broom UP/OFF Switch
* Side Broom OFF Indicator
Z Vacuum System Switch
* Vacuum System Indicator
AA Scrub System OFF Switch
* Scrub System OFF Indicator
BB Coolant Temperature Gauge
CC Oil Pressure Gauge
DD Fuel Gauge (Gas / Diesel)
EE Voltmeter
FF Brake Pedal
GG Parking Brake Latch
HH Solution Flow Control Lever
II Main Broom Raise/Lower (ON/OFF) Lever
JJ Main Broom Adjust Knob
KK Hopper Safety Support Lever
LL Control Panel
MM Ignition Switch
NN Tilt Wheel Lever
OO Drive Pedal
PP Hour meter
QQ Main Broom Overload Indicator Light
OPERATOR'S COMPARTMENT
OO
FF
HH
II
JJ
KK LL
MM
NN
GG
QQ

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 9
STEERING SYSTEM
FIGURE 1
FIGURE 2
STEERING WHEEL REMOVAL
1See Figure 1. Pry up steering wheel Cap (A).
2Remove center hex Nut (B). Note: This is a metric nut, you will
need a 24mm socket.
3Use a steering wheel puller to remove steering wheel from
splined shaft. NOTE: It may be necessary to enlarge holes in
steering wheel, also be sure to support the metal splined bushing
in the center of the steering wheel (see Figure 2) when pulling
the wheel.
HYDRAULIC STEERING UNIT REMOVAL
1Follow steps 1-3 in the Steering Wheel Removal section.
2Remove the (5) screws that secure the bottom console panel
(location operator’s compartment below steering wheel).
3See Figure 1. Remove the (4) item (C) Screws and pull off the
rubber Steering Boot (D).
4Remove the (4) hex screws (10mm) that secure the hydraulic
steering unit to its Mounting Bracket (E).
5Adjust the tilt steering to help in removing the steer unit and
separate the column. Note: Grip steering column and pull down
on steer unit to easily separate.
6Remove the (5) hydraulic hoses to complete removal of steering
unit.
CAUTION!
There will be oil in the motor and hoses, be prepared to plug
and cap system connections.
FRON T
C
B
A
D
E
Steering Column
Hydraulic Steering Unit
Splined
Bushing

10 - FORM NO. 56043094 / Captor™4300, 4800, 5400
STEERING SYSTEM
HYDRAULIC STEERING CYLINDER REMOVAL
1Remove the recovery tank assembly from the machine.
2Follow steps in the Solution Tank Removal section.
3Remove the (2) screws that secure the electrical relay mount assembly and pull it out from the control box compartment.
4See Figure 3. Remove the Hairpin (F) and then slide out the cylinder Mount Pin (G).
5Remove the cylinder hoses, then plug and cap to prevent oil lose and system contamination.
6Mark the steering rack and spur gear location with a center punch to help when reassembling.
7Lift the rack and cylinder assembly straight up to complete its removal from the chassis.
8With the rack and cylinder assembly removed inspect the nylon wear plates. Replace when mounting screws are exposed and
striking the rack.
WEAR ADJUSTMENT FOR CYLINDER RACK
1See Figure 3. Loosen the (2) Hex HD Screws (H). Then using a large flat bladed screwdriver pry between the Adjustment Bracket (I)
and the steer spindle. This will remove any excessive play in the nylon wear plate and the rack, then tighten bracket-mounting screws
to secure.
STEERING SPINDLE ASSEMBLY REMOVAL
1Remove the squeegee tool assembly from the machine then remove the ignition key, set the parking brake and block the front
wheels.
2Remove the solution tank assembly (see Solution Tank Removal section for instructions).
3See Figure 3. Remove the (2) (H) Hex Screws that fasten the rack adjustment Bracket (I) then rotate the bracket to clear the spur
gear and remove.
4Remove from the spindle shaft the Cotter Pin (J) and Castle Nut (K). Next remove the (2) Set Screws (L) using a 4mm hex key
wrench.
5Pull the spur gear from its shaft then remove the square shaft Key (M) and Gear Spacer (N). Note: The gear spacer bevel faces down
to reassemble.
WARNING!
Never work under a machine without safety blocks and stands to support machine.
6Jack up the rear of the machine approximately 24 inches (60cm) and put the jack stands in place under rear corner supports. Note:
Guide the spindle and wheel assembly out from under its frame housing being careful not to damage shaft threads and bearing
surfaces.
7Important Service Tip: Observe the hydraulic wheel motor hoses their routing and correct fitting locations then disconnect the (3)
hoses, (2) P-clamps (plug and cap hoses and fittings).
8Service Tip: When installing or removing the spindle wheel assembly, use a piece of cardboard underneath the wheel to help in sliding
the assembly around (positioning).
BEARING REPLACEMENT AND SPINDLE INSTALLATION
1You now have access to the upper and lower bearing cones, cups and seals (O, P& Q). Note: If replacing or inspecting bearings be
sure to (re) pack bearings with white lithium grease before installing.
2To reassemble, first install the lower bearing cup, cone and seal into the Steering Casting (R). Note: It is important that the shaft
goes through the lower bearing as straight as possible, it may be easier to install the spindle with the tire removed placing the spindle
weldment on top of a movable service jack.
3Slowly lower the rear of the machine guiding and repositioning the shaft through the center of the housing until the drive wheel
supports the machine.
4Install the upper bearing cup, cone, seal, spacer and spur gear.
5Install and tighten the castle nut, torque to 40 ft/lbs. (54Nm). Then loosen nut to align cotter pin.
6Follow the spindle removal steps 1-4 in reverse order. Check that the drive wheel is positioned straight ahead, align the rack and gear
(marked teeth). Next follow the adjustment instructions for the cylinder rack and spur gear clearance (fit up) to eliminate any sloppy
steering operation.

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 11
STEERING SYSTEM
FIGURE 3
L
F
J
H
MK
G
I
P
P
O
O
Q
Q
N
R
FRONT

12 - FORM NO. 56043094 / Captor™4300, 4800, 5400
WHEEL DRIVE SYSTEM
DRIVE TIRE REMOVAL
WARNING!
Never work under a machine without safety block or stands to support machine.
Disconnect battery before servicing.
1Turn steering wheel to the right full lock position and also remove the squeegee tool.
2Turn off engine, set parking brake and block front wheels.
3See Figure 1. Remove the (6) Wheel Lug Nuts (A) (use a 21mm socket). Installation torque is100 ft/lbs. (135 N/M).
4If removing drive motor, remove the Cotter Pin (B) and loosen the motor shaft Castle Nut (C). Note: You will need a 1-7/16 inch socket
for castle nut (see torque notes Figure 1).
5Thread (2) 1/2-13 x 2” threaded to HD Pusher Bolts (D) into the (E) Tire Hubs threaded holes.
6Jack up machine until wheel clears the floor and place jack stands under machine.
7Turn (thread) in equally both bolts to separate the tire assembly from the wheel motor Drive Hub (F).
WHEEL DRIVE MOTOR REMOVAL
1Follow steps 1-7 in Drive Tire Removal section.
2Remove the drive motor shaft castle nut.
3Mark and remove the three hydraulic hoses at the motor.
CAUTION!
There will be oil in the hoses and motor, be prepared to plug hoses and cap motor fittings.
4Remove the (4) Hex Screws (G) and Nuts (H) and remove the motor from the spindle weldment. Use a puller to remove the drive hub
assembly from the tapered motor shaft and reuse (salvage).
5Reassemble in reverse order (see torque notes Figure 1). Operate the machine and check for leaks and proper performance.
FIGURE 1
D
C
A
B
G
E
F
H
Torque to 375 ft./lbs. (508 Nm) dry
or 475 ft./lbs. (644 Nm) lubed,
then tighten to align cotter pin.
Torque to
100 ft./lbs. (135 Nm).
FRONT

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 13
WHEEL DRIVE SYSTEM
HYDROBACK DRIVE PEDAL NEUTRAL ADJUSTMENT
When servicing the hydrostatic drive system, always check for any machine creeping (movement) in the neutral position. The machine
must not move in either Fwd or Rev after the drive pedal is released. If machine creeping is experienced the neutral position of the hydro
back must be adjusted.
WARNING!
Use jack stands to support the machine when setting the neutral drive pedal adjustment.
1Block the front wheels. Jack up machine until the rear drive wheel is off the floor. Place supports at the rear corners of the
machine.
2Remove the right side engine cover to access the hydroback adjustment bracket.
3See Figure 2. Loosen the two Lock Screws (I) that secure the moveable cable mount Bracket (J) to the chassis.
4Start the engine and observe the direction of the drive wheel rotation. Next turn the adjustment Screw (K) clockwise (CW) or
counterclockwise (CCW) to move the cable mounting bracket (in or out) enough to stop any wheel movement. The pump arm is now
in neutral, tighten the two lock screws to secure the neutral pump arm setting.
5Test the neutral adjustment by activating the drive pedal in both FWD & REV to confirm proper wheel motor control. Readjust again
if neutral setting is not repeatable. Replace the hydroback and or its linkage if a neutral adjustment can not be obtained.
6Turn the engine off then check to see that it will restart. If engine will not start the pedal sense switch is probably out of its neutral (dead
band) setting and needs to be reprogrammed. See the sense switch replacement manual section for programming instructions.
HYDROBACK CABLE ASSEMBLY REMOVAL
1Disconnect at both cable ends (foot pedal and pump arm) the Clevis (L) and Rod End (M).
2Loosen both cable anchor connector nuts.
3Slide hydroback assembly from its chassis and cable adjustment mounting brackets.
4After installing a new cable/hydroback see the hydroback pedal neutral adjustment instructions.
FIGURE 2
I
J
K
L
M
FRONT

14 - FORM NO. 56043094 / Captor™4300, 4800, 5400
FRONT WHEEL SYSTEM
FRONT WHEEL REMOVAL AND BRAKE INSPECTION
1Raise hopper and engage safety support.
2Open broom-housing door (LH or RT) and remove the top gasket seal (so not to damage). Place jack towards front of housing and
jack on machine frame to where the front wheel clears the floor.
3Place safety blocking under the front frame member to support.
4Remove the Wheel Screw (A) then work the tire off of wheel spindle. Note: the parking brake must be released to allow wheel to be
removed. Also tap on the backside of wheel with wood blocking to help loosen a stubborn stuck wheel.
5Inspect the spindle; wheel bearings and brake shoe linings for abnormal wear and replace all worn parts. A new brake shoe lining
thickness will measure 11/64 (.172) inches or 4.4 mm.
6Check for approximately one inch (25mm) of operator brake pedal free-play (see instructions below to adjust) and test drive machine
for proper operation.
FRONT BRAKE SHOE ADJUSTMENT
1Raise hopper and engage safety support.
2See Figure 1. Remove the (6) Philips Screws (B) then pull the broom Housing Skirt (C) to the side to access the brake cable clevis.
3See Figure 1 detail of clevis adjustment, length or shorten its threaded end to obtain the correct brake pedal free play. Note both
brakes (LH & RT) need to be adjusted equally.
4If the brake cable clevis adjustment does not eliminate excessive pedal travel (poor braking performance) check for worn out brake
shoes and a stretched brake cable. The ends of the brake cable at the wheels have adjustable threaded cable anchor fittings.
Shorten the length of cable wire extending out of the cable casing by adjusting the cable anchor fittings at the wheel casting pocket
(inset).
BRAKE CABLE REPLACEMENT
1Follow the scrub deck removal instruction in the scrub system manual section. The removal of the deck is necessary to access the
brake pedal cable guide pulley and cable anchor points (location middle of machine under operator floor plate).
2See the brake shoe adjustment instructions above to remove the brake cable ends at the wheels.

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 15
FRONT WHEEL SYSTEM
FIGURE 1
B
A
C
B
FRONT

16 - FORM NO. 56043094 / Captor™4300, 4800, 5400
HYDRAULIC SYSTEM
REMOVAL OF HYDRAULIC OIL COOLER
CAUTION!
Disconnect the battery before servicing.
1Remove the right side engine panel.
2See Figure 1. Remove the (2) hydraulic hoses attached to the Pre-charge Filter Housing (A). Then remove the (2) inlet and outlet oil
cooler hoses (plug and cap all hoses).
3Remove the (2) Pivot Bolts (B) that fasten the oil cooler to the radiator mount. Then pull the cooler out of the machine.
REMOVAL OF ENGINE COOLANT RADIATOR
CAUTION!
Disconnect the battery before servicing.
1Remove the hydraulic oil cooler by following the instructions in this manual section.
2See Figure 1. Remove the radiator cap and coolant over-flow hose then drain the coolant from the radiator using the Drain Hose
(C).
3Remove the two front operator compartment Access Panels (D &E) located in front of operator’s feet and below the steering wheel
console.
4Remove both the upper and lower radiator hoses. Note: To remove the bottom hose work through the operator compartment access
panel.
5Work through the two previously removed access panels to remove the (2) Hex Screws (F) and (2) Hex Nuts (G) that fasten the left
side radiator mount.
6Remove the (6) Screws (H) that hold the radiator to its mount. Then carefully slide the radiator out of the machine. Note some loss
of coolant will occur when removing.
REMOVAL OF HYDRAULIC ENGINE FAN MOTOR
1Remove the hydraulic oil cooler and engine radiator by following the two separate sets of instructions in this manual section.
2See Figure 1. Remove the (4) fan mounting Screws (I) then pull off the fan from the Fan Spacer Hub (J).
3Loosen the (2) spacer hub set screws then pull the hub from the fan motor shaft.
4Remove the (3) fan motor hydraulic hoses (plug and cap).
5Remove the (4) Nuts (K) and (4) Bolts (L) to complete the removal of the motor from its mounting bracket.

FORM NO. 56043094 / Captor™4300, 4800, 5400 - 17
HYDRAULIC SYSTEM
FIGURE 1
H
K
B
L
G
F
I
J
A
C
B
D
E
FRONT

18 - FORM NO. 56043094 / Captor™4300, 4800, 5400
HYDRAULIC SYSTEM
ACCESSORY PUMP ASSEMBLY REMOVAL
CAUTION!
Disconnect the battery before servicing.
1Remove right side engine panel.
2See Figure 2. Disconnect the (3) accessory pump Outlet Hoses (M, N &O) (plug & cap).
3Remove the (3) tee fittings from the pump housing assembly and plug. Note: The fittings need to be removed to access the right
housing mounting bolt.
4Remove the two-pump flange Mounting Bolts (P) and separate the accessory pump assembly from the propulsion pump. Note: Be
prepared to collect oil loss when the pump is pulled apart.
5Raise the pump assembly above the height of the oil reservoir before disconnecting the large pump assembly inlet Feed Hose (Q) to
prevent excessive oil loss from the reservoir (plug & cap). Service Note: When removing the accessory pump assembly to remove
the propulsion pump (create the necessary service working clearance). Leave the large hydraulic feed hose on the accessory pump
attached. No need to plug and cap it, just tie it safely to the chassis above the oil reservoir. This will prevent the unnecessary need
to disconnect the hose and eliminate any leakage of hydraulic oil.
PROPULSION PUMP REMOVAL
CAUTION!
Disconnect the battery cables then remove the battery before servicing.
1Remove the hydraulic oil cooler, engine radiator and the accessory pump assembly by following the three separate sets of instructions
in this manual section.
2See Figure 2. Remove the Sense Switch (R) secured with the Screw (S) from the Lever Weldment (T). Note: Do not lose the small
Bushing (U) and Washer (V).
3Disconnect the Ball Joint (cable rod end) (W) from the Lever (T).
4Remove the lever weldment from the propulsion pump shaft secured by hardware items (X & Y).
5Disconnect the (4) Hoses (Z, AA, AB &AC) as shown from the propulsion pump (plug and cap).
6Remove the (2) Hex HD Screws (AD) that fasten the pump assembly to the engine bell housing. Technical Note: Reference Figure
3, this illustrates a Special Tool (AE) that a mechanic will need to fabricate to remove the bottom pump retaining screw.
7To complete the removal of the pump from the machine pull straight back to separate it from the engine flywheel coupler.
8To reassemble follow the above steps in reverse order and read the service notes shown below if the engine will not start or machine
creeps when drive pedal is in neutral.
Service Note 1: If engine will not start see captor Quick Start Service Manual, engine starter will not crank troubleshooting flow chart. The
pedal sense switch is probably out of its neutral dead band setting and needs to be reprogrammed. Follow the foot pedal neutral and dead
band adjustment programming instructions shown in this manual’s sense switch replacement section.
WARNING!
Jack up the rear drive tire before starting machine to check for possible drive wheel creep, linkage out of adjustment.
Service Note 2: If machine creeps without operator pedal input see Hydroback Drive Pedal Neutral Adjustment in this manual to re-set
neutral.