PDF Service Manual Bobcat S185 Skid Steer Loader - 7 MB
This is the official service manual for the Bobcat S185 Skid Steer Loader.
It provides comprehensive, step-by-step instructions for service, repair, and maintenance.
The manual covers everything from the hydraulic system to the engine, with detailed diagrams and specifications.
It is an indispensable resource for any technician working on the S185.
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Service Manual
S185 Skid-Steer Loader
S/N A3L911001 & Above
S/N A3LH11001 & Above
S/N AEYU11001 & Above
EQUIPPED WITH
BOBCAT INTERLOCK
CONTROL SYSTEM (BICS™)
6987049 (3-11) Printed in U.S.A. © Bobcat Company 2011
--- Page 3 ---
FW SSL-1008 SM
1-9 S185 Service Manual
--- Page 4 ---
STOPPING THE ENGINE AND LEAVING THE LOADER . . . . . . . . . . . . . . . . . . . . . . 10-200-1
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-200-1
EMERGENCY EXIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-210-1
Rear Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-210-1
Front Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-210-1
SEAT BELT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-220-1
Inspection And Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-220-1
10-03
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TRANSPORTING LOADER ON A TRAILER Fastening
Loading And Unloading Figure 10-40-2
WARNING
AVOID SERIOUS INJURY OR DEATH
Adequately designed ramps of sufficient strength are
needed to support the weight of the machine when
loading onto a transport vehicle. Wood ramps can
break and cause personal injury. P-31228 P-73276
W-2058-0807
Be sure the transport and towing vehicles are of
adequate size and capacity for weight of loader. (See
Capacities on Page SPEC-10-4.)
Figure 10-40-1
Alternate Front Tie Down
P-31829
1 P-24480
P-31912
Use the following procedure to fasten the Bobcat loader
to the transport vehicle to prevent the loader from moving
A loader with an empty bucket or no attachment must be during sudden stops or when going up or down slopes
loaded backward onto the transport vehicle [Figure 10- [Figure 10-40-2].
40-1].
• Lower the bucket or attachment to the floor.
The rear of the trailer must be blocked or supported (Item
1) [Figure 10-40-1] when loading or unloading the loader • Stop the engine.
to prevent the front end of the trailer from raising up.
• Engage the parking brake.
• Install chains at the front and rear loader tie down
positions [Figure 10-40-2].
• Fasten each end of the chain to the transport vehicle.
• Use chain binders to tighten the chains.
10-40-1 S185 Service Manual
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REMOTE START TOOL (SERVICE TOOL) KIT -
7003031
Description
The Remote Start Tool (Service Tool) Kit is a replacement
tool for MEL 1563 Remote Start Tool and MEL 1400B -
BOSS® Diagnostic Tool.
The Remote Start Tool (Service Tool) Kit, P/N 7003031,
can be used to service older loaders with the BOSS®
system using the supplied BOSS® Service Tool Harness
P/N 6689745.
The Remote Start Tool (Service Tool) Kit, P/N 7003031,
can be used to service newer loaders using the supplied
harness P/N 6689747.
A computer can be connected to the Remote Start Tool
(Service Tool) for diagnostics and software updates using
the computer harness P/N 6689746 in conjunction with
the loader harness.
10-61-1 S185 Service Manual
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AIR CLEANER SERVICE Outer Filter
Replacing Filter Elements Figure 10-80-3
Figure 10-80-1
2 2
1
3
1
P-76460G
P-76883
Figure 10-80-2
Open the latches (Item 1) and remove the dust cover
(Item 2) [Figure 10-80-3].
Figure 10-80-4
1
B-15553M
1
It is important to change the air filter element only when
necessary. The Service indicator (Item 1) will FLASH and
P-76884
service code [M0117] (Air Filter Plugged) will show in the
Data Display (Item 2) when the Information button (Item
3) [Figure 10-80-1] is held for two seconds. Pull the outer filter element (Item 1) [Figure 10-80-4] out
and discard.
The Air Cleaner icon on the Deluxe Instrumentation
Panel, if equipped, will be ON (Item 1) [Figure 10-80-2]. NOTE: Make sure all sealing surfaces are free of dirt
and debris. Do not use compressed air.
Replace the inner filter every third time the outer filter is
replaced or as indicated. Install new filter element. Push all the way in until it
contacts the base of the housing.
Install the dust cover and secure the latches [Figure 10-
80-3]
10-80-1 S185 Service Manual
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ENGINE LUBRICATION SYSTEM Engine Oil Chart
Checking And Adding Engine Oil ENGINE OIL
RECOMMENDED SAE VISCOSITY NUMBER
Check the engine oil level every day before starting the (LUBRICATION OILS FOR DIESEL ENGINE
engine for the work shift. CRANKCASE)
Figure 10-110-2
Figure 10-110-1
3
1
2
4
P-76971
Open the rear door and remove the dipstick (Item 1) TEMPERATURE RANGE ANTICIPATED BEFORE
[Figure 10-110-1]. NEXT OIL CHANGE (DIESEL ENGINES MUST USE API
CLASSIFICATION CI-4 OR BETTER)
Keep the oil level between the marks on the dipstick. Do [1]Synthetic Oil - Use recommendation from Synthetic Oil
not overfill. Manufacturer.
Use good quality engine oil that meets API Service
Classification of CI-4 or better. [Figure 10-110-2].
10-110-1 S185 Service Manual
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FINAL DRIVE TRANSMISSION (CHAINCASE) Removing And Replacing Oil
Checking And Adding Oil Figure 10-130-2
The chaincase contains the final drive sprockets and
chains. Use the same type of oil as the hydraulic /
hydrostatic system. (See (S185) LOADER
SPECIFICATIONS on Page SPEC-10-1.).
1
Stop the loader on a level surface and stop the engine.
Figure 10-130-1
1
P-76684
Remove the check plug (Item 1) [Figure 10-130-2] from
the front of the chaincase housing.
Figure 10-130-3
P-31287
Remove the check plug (Item 1) [Figure 10-130-1] from
the front of the chaincase housing.
If oil can be reached with the tip of your finger through the
hole, the oil level is correct.
If the level is low, add oil through the check plug hole until
oil flows from the hole.
P-31287B
Install and tighten the plug.
Remove the oil from the chaincase [Figure 10-130-3].
Recycle or dispose of the used oil in an environmentally
safe manner.
Add oil through the check plug hole until the oil flows from
the hole.
WARNING
AVOID INJURY OR DEATH
Always clean up spilled fuel or oil. Keep heat, flames,
sparks or lighted tobacco away from fuel and oil.
Failure to use care around combustibles can cause
explosion or fire.
W-2103-0508
10-130-1 S185 Service Manual
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SPARK ARRESTER MUFFLER Remove the plug (Item 1) [Figure 10-170-1] from the
bottom of the muffler.
Cleaning Procedure
See the SERVICE SCHEDULE for service interval for
cleaning the spark arrester muffler. (See SERVICE
SCHEDULE on Page 10-70-1.)
WARNING
Do not operate the loader with a defective exhaust
When the engine is running during service, the
system.
driving and steering controls must be in neutral and
the parking brake engaged. Failure to do so can
cause injury or death.
W-2006-1209
IMPORTANT
Start the engine and run for about 10 seconds while a
This machine is factory equipped with a U.S.D.A. second person, wearing safety glasses, holds a piece of
Forestry Service approved spark arrester exhaust wood over the outlet of the muffler.
system. This will force contaminants out through the clean out
hole.
The spark arrester muffler, if equipped, must be
cleaned to keep it in working condition. The spark Stop the engine.
arrester muffler must be serviced by dumping the Install and tighten the plug.
spark chamber every 100 hours of operation.
Close the rear door.
On some models, the turbocharger functions as the
spark arrester and must operate correctly for proper
spark arrester function.
WARNING
If this machine is operated on flammable forest,
brush, or grass covered land, it must be equipped AVOID INJURY OR DEATH
with a spark arrester attached to the exhaust system When an engine is running in an enclosed area, fresh
and maintained in working order. Failure to do so will air must be added to avoid concentration of exhaust
be in violation of California State Law, Section 4442. fumes. If the engine is stationary, vent the exhaust
PRC. Refer to local laws and regulations for spark outside. Exhaust fumes contain odorless, invisible
arrester requirements. gases which can kill without warning.
I-2284-0111 W-2050-0807
Stop the engine. Open the rear door.
Figure 10-170-1
WARNING
Stop engine and allow the muffler to cool before
cleaning the spark chamber. Wear safety goggles.
Failure to obey can cause serious injury.
W-2011-1285
1
WARNING
Never use machine in atmosphere with explosive
P-76902 dust or gases or where exhaust can contact
flammable material. Failure to obey warnings can
cause injury or death.
W-2068-1285
10-170-1 S185 Service Manual
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SEAT BELT Figure 10-220-1
Inspection And Maintenance 1
WARNING 3
Failure to properly inspect and maintain the seat belt
can cause lack of operator restraint resulting in
serious injury or death.
W-2466-0703
2 4
Check the seat belt daily for correct function.
Inspect the seat belt system thoroughly at least once
each year or more often if the machine is exposed to
severe environmental conditions or applications.
Any seat belt system that shows cuts, fraying, extreme or
unusual wear, significant discolorations due to ultraviolet
UV exposure, dusty / dirty conditions, abrasion to the
seat belt webbing, or damage to the buckle, latch plate,
retractor (if equipped), hardware or any other obvious
problem should be replaced immediately. B-22283
The items below are referenced in [Figure 10-220-1].
1. Check the webbing. If the system is equipped with a
retractor, pull the webbing completely out and inspect
the full length of the webbing. Look for cuts, wear,
fraying, dirt and stiffness.
2. Check the buckle and latch for correct operation.
Make sure latch plate is not excessively worn,
deformed or buckle is not damaged or casing broken.
3. Check the retractor web storage device (if equipped)
by extending webbing to determine if it looks correct
and that it spools out and retracts webbing correctly.
4. Check webbing in areas exposed to ultraviolet (UV)
rays from the sun or extreme dust or dirt. If the original
color of the webbing in these areas is extremely faded
and / or the webbing is packed with dirt, the webbing
strength may have deteriorated.
See your Bobcat dealer for seat belt system replacement
parts for your machine.
10-220-1 S185 Service Manual
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HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH 2 SPEED OPTION
S185 (S/N A3L911001 AND ABOVE)
(S/N A3LH11001 AND ABOVE)
(S/N AEYU11001 AND ABOVE)
(PRINTED JANUARY 2009)
V-1131legend
LEGEND
1 RESERVOIR: 15 LIFT CYLINDER SPOOL - MADE TO 30 RELIEF VALVE: 3300 PSI (228 Bar) 47 RELIEF VALVE - 2000 PSI (137 Bar)
Capacity . . . . . . . 19.2 Qts. (18,2 L) RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP 31 FILTER - HYDRAULIC (CANISTER) 48 RELIEF VALVE - 1200 PSI (83 Bar)
2 SPRING LOADED FILTER BY-PASS
VALVE: 45-55 PSI (3,1-3,8 Bar) 16 SOLENOID ACTIVATED DIRECTIONAL 32 FILTER - CASE DRAIN (SINTERED 49 SOLENOID ACTIVATED DIRECTIONAL
3 DIFFERENTIAL PRESSURE SWITCH: CONTROL VALVE - BICS CONTROL BRONZE) CONTROL VALVE (TWO COIL)
36-44 PSI (2,5-3,0 Bar) 33 FILTER - BICS CONTROL VALVE 50 FIXED CAPACITY DISPLACEMENT
17 PILOTED ACTIVATED DIRECTIONAL
Normally Closed (SCREEN) HYDRAULIC MOTOR
CONTROL VALVE - TILT CONTROL
4 DRIVE MOTOR SHUTTLE VALVE 34 CHECK VALVE - BUCKET POSITION
18 PILOTED ACTIVATED DIRECTIONAL 51 ANTICAVITATION VALVE
CONTROL VALVE - LIFT CONTROL VALVE
5 RELIEF/REPLENISHING VALVE - HIGH 35 RESTRICTION 52 PROPORTIONAL RELIEF VALVE –
PRESSURE: 5000 PSI (345 Bar) 19 PULL BUTTON ACTIVATED (Fan Speed Regulator):
DIRECTIONAL CONTROL VALVE - LIFT 36 VARIABLE CAPACITY DISPLACEMENT 1566 - 1784 PSI (108 - 123 bar)
6 RELIEF VALVE - CHARGE INLET: ARM BY-PASS BIDIRECTIONAL HYDROSTATIC PUMP
360 PSI (24,8 Bar) 53 FILTER - BOB-TACH VALVE
at High Engine Idle 20 PILOTED ACTIVATED DIRECTIONAL 37 CHECK VALVE - With 5 PSI (0,34 Bar) Spring
With 140 degrees F. (60 degrees C.) Fluid CONTROL VALVE - UNLOADING 54 RESTRICTION - 0.343 inch (8,73 mm)
SPOOL 38 BIDIRECTIONAL HYDROSTATIC
MOTOR – 2 SPEED 55 SENSOR – CHARGE PRESSURE – Fan
7 FRONT AUXILIARY MANUAL PRESSURE 21 PILOTED ACTIVATED DIRECTIONAL
Filter
BLEED-OFF VALVE CONTROL VALVE - FLOW CONTROL
SPOOL 39 CHECK VALVE - With 80 PSI (5,5 Bar) Spring 56 SENSOR – HYD. TEMP. – Hyd. Filter
8 HYDRAULIC PUMP . . . . . . . Gear Type
16.9 GPM (64 L/min.) at High Engine Idle 22 FLOW DIVIDER ADJUSTMENT VALVE 40 SOLENOID ACTIVATED DIRECTIONAL 57 HIGH PRESSURE SHUTTLE
CONTROL VALVE - BUCKET POSITION
9 RELIEF VALVE - MAIN: 23 SOLENOID ACTIVATED DIRECTIONAL VALVE (ON/OFF) 58 SOLENOID ACTIVATED DIRECTIONAL
3250-3350 PSI (224-231 Bar)
CONTROL VALVE - BASE CONTROL VALVE – WARM UP
at Front Quick Couplers 41 CHECK VALVE - BICS CONTROL VALVE
24 SOLENOID ACTIVATED DIRECTIONAL 59 SOLENOID ACTIVATED DIRECTIONAL
10 RELIEF/ANTICAVITATION VALVE - 42 CHARGE PUMP -
CONTROL VALVE - ROD CONTROL VALVE – 2 SPEED
PORT 3500 PSI (241,3 Bar) 12.8 GPM (48,5 L/min) at High Engine Idle
60 PILOT ACTIVATED DIRECTIONAL
11 ANTICAVITATION VALVE 25 LOAD SHUTTLE VALVE - BLEED OFF CONTROL VALVE – HIGH / LO SPEED
43 CHECK VALVE - With 300 PSI (20,7 Bar)
Spring And With 0.016 inch (0,40 mm) Orifice 61 CHECK VALVE – With 125 PSI (8,6 bar) Spring
12 SOLENOID ACTIVATED DIRECTIONAL 26 SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY CONTROL VALVE - TWO COIL 44 PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
13 RELIEF/ANTICAVITATION VALVE - 27 PILOT ACTIVATED DIRECTIONAL
POWERED BOB-TACH
PORT (OPTIONAL) 3500 PSI (241,3 Bar) CONTROL VALVE - REAR AUXILIARY
45 RESTRICTION - 0.089 inch (2,26 mm)
28 RESTRICTOR - 0.140 inch (3,6 mm)
14 LOAD CHECK VALVE
46 RESTRICTION - 0.025 inch (0,6 mm)
29 RESTRICTOR - 0.031 inch (0,8 mm) NOTE: Unless otherwise specified
springs have NO significant
pressure value.
Printed in U.S.A. V-1131legend (1-13-09)
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HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH SJC AND HIGH FLOW OPTION
S185 (S/N A3L911001 AND ABOVE)
(S/N A3LH11001 AND ABOVE)
(S/N AEYU11001 AND ABOVE)
(PRINTED JANUARY 2009)
V-1136legend
LEGEND
1 RESERVOIR: 16 SOLENOID ACTIVATED DIRECTIONAL 32 FILTER - CASE DRAIN (SINTERED 49 SOLENOID ACTIVATED DIRECTIONAL
Capacity . . . . . . . 19.2 qt. (18,2 L) BRONZE) CONTROL VALVE (TWO COIL)
CONTROL VALVE - BICS CONTROL
2 SPRING LOADED FILTER BY-PASS 50 RELIEF VALVE - 3300 PSI (228 bar)
17 PILOTED ACTIVATED DIRECTIONAL 33 FILTER - BICS CONTROL VALVE
VALVE: 45-55 PSI (3,1-3,8 bar)
CONTROL VALVE - TILT CONTROL (SCREEN) 51 DUMP VALVE - (ON/OFF)
3 DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 bar) 18 PILOTED ACTIVATED DIRECTIONAL 34 CHECK VALVE - BUCKET POSITION 52 CHECK VALVE
Normally Closed CONTROL VALVE - LIFT CONTROL VALVE
4 DRIVE MOTOR SHUTTLE VALVE 19 PULL BUTTON ACTIVATED 53 AUXILIARY HYDRAULIC PUMP -
35 RESTRICTION
DIRECTIONAL CONTROL VALVE - 9.5 GPM (36 L/min) at High Engine Idle
5 RELIEF/REPLENISHING VALVE - HIGH LIFT ARM BY-PASS
36 VARIABLE CAPACITY DISPLACEMENT 54 CHECK VALVE - With 300 PSI (20,7 bar) Spring
PRESSURE: 5075 PSI (350 bar) 20 PILOTED ACTIVATED DIRECTIONAL with 0.016 inch (0,40 mm) orifice
BI-DIRECTIONAL HYDROSTATIC PUMP
CONTROL VALVE - UNLOADING 55 SOLENOID ACTIVATED CONTROL
6 RELIEF VALVE - CHARGE INLET: SPOOL 37 SHUTTLE RELIEF VALVE
VALVE - FORWARD/REVERSE
360 PSI (24,8 bar) (Not Adjustable - Factory Set)
21 PILOTED ACTIVATED DIRECTIONAL 56 SERVO PISTON -Swash Plate
at High Engine Idle 65 PSI (4,5 bar)
With 140 degrees F. (60 degrees C.) Fluid CONTROL VALVE - FLOW CONTROL
SPOOL 38 FIXED CAPACITY DISPLACEMENT 57 POSITION SENSOR -Swash Plate
7 FRONT AUXILIARY MANUAL BI-DIRECTIONAL HYDROSTATIC
22 FLOW DIVIDER ADJUSTMENT VALVE MOTOR 58 CHARGE PRESSURE SENSOR
PRESSURE BLEED-OFF VALVE
8 HYDRAULIC PUMP . . . . . . . Gear Type 39 CHECK VALVE - With 80 PSI (5,5 bar) Spring
23 SOLENOID ACTIVATED DIRECTIONAL 59 CHARGE PUMP -
16.9 GPM (64 L/min.) at High Engine Idle 12.8 GPM (48,5 L/min) at High Engine Idle
CONTROL VALVE - BASE
40 SOLENOID ACTIVATED DIRECTIONAL
9 RELIEF VALVE - MAIN: 24 SOLENOID ACTIVATED DIRECTIONAL CONTROL VALVE - BUCKET POSITION 60 FIXED CAPACITY DISPLACEMENT
3250-3350 PSI (224-231 bar) CONTROL VALVE - ROD VALVE (ON/OFF) HYDRAULIC MOTOR
at Front Quick Couplers 41 CHECK VALVE - BICS CONTROL VALVE 61 ANTICAVITATION VALVE
25 LOAD SHUTTLE VALVE - BLEED OFF
10 PORT RELIEF/ANTICAVITATION VALVE
3500 PSI (241,3 bar) 26 42 RESTRICTION - 0.343 inch (8,7 mm) 62 PROPORTIONAL RELIEF VALVE –
SOLENOID ACTIVATED DIRECTIONAL
11 ANTICAVITATION VALVE CONTROL VALVE - TWO COIL (Fan Speed Regulator):
43 FILTER - Bob-Tach Valve 1566 - 1784 PSI (108 - 123 bar)
27 PILOT ACTIVATED DIRECTIONAL
12 SOLENOID ACTIVATED DIRECTIONAL CONTROL VALVE - REAR AUXILIARY 44 PILOT ACTIVATED DIRECTIONAL 63 SENSOR – CHARGE PRESSURE – Fan
CONTROL VALVE - AUXILIARY CONTROL VALVE - HYDRAULIC Filter
28 RESTRICTOR - 0.140 inch (3,6 mm) POWERED BOB-TACH
13 PORT RELIEF/ANTICAVITATION VALVE: 64 SENSOR – HYD. TEMP. – Hyd. Filter
45 RESTRICTION - 0.089 inch (2,26 mm)
. . . . . (Optional) 29 RESTRICTOR - 0.031 inch (0,8 mm)
3500 PSI (241,3 bar) 46 RESTRICTION - 0.025 inch (0,6 mm)
14 LOAD CHECK VALVE 30 RELIEF VALVE: 3300 PSI (228 bar)
47 RELIEF VALVE - 2000 PSI (137 bar)