PDF Service Manual Bobcat S185 Skid Steer Loader - 6 MB
This complete service manual provides all the information needed to repair and maintain your Bobcat S185 Skid-Steer Loader.
It contains step-by-step procedures for servicing the engine, hydraulics, drive system, and more.
With detailed diagrams and specifications, this manual is the ultimate tool for both professional mechanics and skilled owners.
Keep your S185 in peak condition with this comprehensive guide.
PDF Viewer
Viewer loads when you scroll here
SHARE THIS MANUAL
Download the PDF Manual
PDF viewer loading area
Text Preview from This Manual
The text below was extracted from the visible preview pages to help you confirm the manual contents before download.
--- Page 1 ---
Service Manual
S185 Skid-Steer Loader
S/N 530360001 & Above
S/N 530460001 & Above
S/N ABRT60001 & Above
EQUIPPED WITH
BOBCAT INTERLOCK
CONTROL SYSTEM (BICS™)
6987036 (8-09) Printed in U.S.A. © Bobcat Company 2009
--- Page 3 ---
SAFETY INSTRUCTIONS The following publications provide information on the
safe use and maintenance of the Bobcat machine and
attachments:
Safety Alert Symbol
• The Delivery Report is used to assure that complete
This symbol with a warning statement means: instructions have been given to the new owner and
“Warning, be alert! Your safety is involved!” that the machine is in safe operating condition.
Carefully read the message that follows.
• The Operation & Maintenance Manual delivered with
the machine or attachment contains operating
information as well as routine maintenance and
service procedures. It is a part of the machine and can
WARNING be stored in a container provided on the machine.
Replacement Operation & Maintenance Manuals can
be ordered from your Bobcat dealer.
Instructions are necessary before operating or
servicing machine. Read and understand the • Machine signs (decals) instruct on the safe operation
Operation & Maintenance Manual, Operator’s and care of your Bobcat machine or attachment. The
Handbook and signs (decals) on machine. Follow signs and their locations are shown in the Operation
warnings and instructions in the manuals when & Maintenance Manual. Replacement signs are
making repairs, adjustments or servicing. Check for available from your Bobcat dealer.
correct function after adjustments, repairs or service.
Untrained operators and failure to follow instructions • An Operator’s Handbook fastened to the operator
can cause injury or death. cab. It’s brief instructions are convenient to the
W-2003-0903
operator. The handbook is available from your dealer
in an English edition or one of many other languages.
See your Bobcat dealer for more information on
translated versions.
IMPORTANT
• The AEM Safety Manual delivered with the machine
This notice identifies procedures which must be gives general safety information.
followed to avoid damage to the machine.
I-2019-0284 • The Service Manual and Parts Manual are available
from your dealer for use by mechanics to do shop-
type service and repair work.
• The Skid-Steer Loader Operator Training Course is
DANGER available through your local dealer or at
www.training.bobcat.com or www.bobcat.com.
This course is intended to provide rules and practices
The signal word DANGER on the machine and in the of correct operation of the Skid-Steer Loader. The
manuals indicates a hazardous situation which, if not course is available in English and Spanish versions.
avoided, will result in death or serious injury.
D-1002-1107 • Service Safety Training Courses are available from
your Bobcat dealer or at www.training.bobcat.com
or www.bobcat.com. They provide information for
safe and correct service procedures.
WARNING • The Skid-Steer Loader Safety Video is available from
your Bobcat dealer or at www.training.bobcat.com
The signal word WARNING on the machine and in the or www.bobcat.com.
manuals indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
W-2044-1107
SI SSL-1008 SM
V S185 Service Manual
--- Page 4 ---
SAFETY AND MAINTENANCE (CONT’D)
TIRE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-160-1
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-160-1
Rotating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-160-1
Wheel Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-160-1
TOWING THE LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-50-1
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-50-1
TRANSPORTING LOADER ON A TRAILER . . . . . . . . . . . . . . . . . 10-40-1
Fastening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-40-1
Loading And Unloading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-40-1
TIGHTEN ALL HARDWARE PER SIZE TO GRADE 5 TORQUE (SEE
STANDARD TORQUE SPECIFICATIONS FOR BOLTS, SPEC SECTION)
UNLESS OTHERWISE SPECIFIED.
10-03 S185 Service Manual
--- Page 5 ---
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-64082
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
P-31829
Use the following procedure to fasten the Bobcat loader
to the transport vehicle to prevent the loader from moving
during sudden stops or when going up or down slopes
1 [Figure 10-40-2].
P-31912
• Lower the bucket or attachment to the floor.
• Stop the engine.
A loader with an empty bucket or no attachment must be • Engage the parking brake.
loaded backward onto the transport vehicle [Figure 10-
• Install chains at the front and rear loader tie down
40-1].
positions [Figure 10-40-2].
The rear of the trailer must be blocked or supported (Item • Fasten each end of the chain to the transport vehicle.
1) [Figure 10-40-1] when loading or unloading the loader
to prevent the front end of the trailer from raising up.
10-40-1 S185 Service Manual
--- Page 6 ---
REMOTE START TOOL (SERVICE TOOL) KIT -
6689779
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 6689779,
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 6689779,
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
--- Page 7 ---
AIR CLEANER SERVICE Outer Filter
Replacing Filter Elements Figure 10-80-3
Figure 10-80-1
2
3 1
1
P-76460G
P-48340
Figure 10-80-2
Remove the wing nut and remove the dust cover (Item 1)
[Figure 10-80-3].
Figure 10-80-4
1
1
B-15553M
It is important to change the air filter element only when
necessary. The Service indicator (Item 1) will FLASH and
P-48341
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. Remove the wing nut and 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.
Replace the inner filter every third time the outer filter is
replaced or as indicated. Install new filter. Push all the way in until it contacts the
base of the housing. Install wing nut.
Install the dust cover and the wing nut [Figure 10-80-3]
10-80-1 S185 Service Manual
--- Page 8 ---
ENGINE LUBRICATION SYSTEM Engine Oil Chart
Checking And Adding Engine Oil Figure 10-110-2
Check the engine oil level every day before starting the
engine for the work shift.
Figure 10-110-1
3
1
2
4
B-16320
P-48472
Use a good quality motor oil that meets API Service
Classification of CD or better See Oil Chart [Figure 10-
Open the rear door and remove the dipstick (Item 1) 110-2].
[Figure 10-110-1].
Keep the oil level between the marks on the dipstick. Do
not overfill.
10-110-1 S185 Service Manual
--- Page 9 ---
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 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
--- Page 10 ---
SPARK ARRESTOR MUFFLER
Cleaning Procedure
WARNING
See the SERVICE SCHEDULE for service interval for
cleaning the spark arrestor muffler. (See SERVICE
When the engine is running during service, the
SCHEDULE on Page 10-70-1.)
steering levers must be in neutral and the parking
brake engaged. Failure to do so can cause injury or
Do not operate the loader with a defective exhaust
death.
system. W-2006-0284
Start the engine and run for about 10 seconds while a
second person, wearing safety glasses, holds a piece of
IMPORTANT wood over the outlet of the muffler.
This will force contaminants out through the cleanout
This loader is factory equipped with a U.S.D.A.
hole.
Forestry Service approved spark arrestor muffler. It
is necessary to do maintenance on this spark
Stop the engine.
arrestor muffler to keep it in working condition. The
spark arrestor muffler must be serviced by dumping
Install and tighten the plug.
the spark chamber every 100 hours of operation.
Close the rear door.
If this machine is operated on flammable forest,
brush or grass covered land, it must be equipped
with a spark arrestor attached to the exhaust system
and maintained in working order. Failure to do so will WARNING
be in violation of California State Law, Section 4442
PRC. AVOID INJURY OR DEATH
When an engine is running in an enclosed area, fresh
Consult local laws and regulations for spark arrestor air must be added to avoid concentration of exhaust
requirements fumes. If the engine is stationary, vent the exhaust
I-2022-0807 outside. Exhaust fumes contain odorless, invisible
gases which can kill without warning.
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.
1 Failure to obey can cause serious injury.
W-2011-1285
WARNING
P-48476
Never use machine in atmosphere with explosive
dust or gases or where exhaust can contact
Remove the plug (Item 1) [Figure 10-170-1] from the flammable material. Failure to obey warnings can
bottom of the muffler. cause injury or death.
W-2068-1285
10-170-1 S185 Service Manual
--- Page 11 ---
HYDRAULIC SYSTEM (CONT’D)
HYDRAULIC/HYDROSTATIC FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-80-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-80-1
Charge Filter Housing Removal And Installation . . . . . . . . . . . . . . . . . . . 20-80-3
Housing Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-80-1
HYDRAULIC FLUID RESERVOIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-90-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-90-1
Hydraulic Fluid Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-90-4
Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-90-1
HYDRAULIC PUMP (STANDARD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-1
Direct Pump Test (Charge Section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-4
Direct Pump Test (Standard Section). . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-2
Disassembly And Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-10
Hydraulic Pump Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-8
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-9
Pump Test At Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-1
Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-60-6
HYDRAULIC PUMP (STANDARD) (HIGH FLOW) . . . . . . . . . . . . . . . . . . . . 20-61-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-1
Direct Pump Test (Charge Section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-4
Direct Pump Test (High Flow Section) . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-6
Direct Pump Test (Standard Section). . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-2
Disassembly And Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-12
Hydraulic Pump Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-10
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-11
Pump Test At Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-1
Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-61-8
HYDRAULIC PUMP (SJC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-1
Direct Pump Test (Charge Section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-4
Direct Pump Test (Standard Section). . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-2
Disassembly And Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-10
Hydraulic Pump Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-8
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-9
Pump Test At Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-1
Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-70-6
Continued On Next Page
20-03 S185 Service Manual
--- Page 12 ---
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH SJC OPTION
S185 (S/N 530360001 AND ABOVE)
(S/N 530460001 AND ABOVE)
(S/N ABRT60001 AND ABOVE)
(PRINTED MARY 2008)
V-1248legend
LEGEND
1 RESERVOIR: 16 SOLENOID ACTIVATED DIRECTIONAL 32 FILTER - CASE DRAIN (SINTERED 47 RELIEF VALVE - 2000 PSI (137 bar)
Capacity . . . . . . . 19.2 qt. (18,2 L) CONTROL VALVE - BICS CONTROL BRONZE)
2 SPRING LOADED FILTER BY-PASS 48 RELIEF VALVE - 1200 PSI (83 bar)
17 PILOTED ACTIVATED DIRECTIONAL 33 FILTER - BICS CONTROL VALVE
VALVE: 45-55 PSI (3,1-3,8 bar)
CONTROL VALVE - TILT CONTROL (SCREEN) 49 SOLENOID ACTIVATED DIRECTIONAL
3 DIFFERENTIAL PRESSURE SWITCH: CONTROL VALVE (TWO COIL)
36-44 PSI (2,5-3,0 bar) 18 PILOTED ACTIVATED DIRECTIONAL 34 CHECK VALVE - BUCKET POSITION
Normally Closed CONTROL VALVE - LIFT CONTROL VALVE 50 FIXED CAPACITY DISPLACEMENT
19 PULL BUTTON ACTIVATED HYDRAULIC MOTOR
4 DRIVE MOTOR SHUTTLE VALVE 35 RESTRICTION
DIRECTIONAL CONTROL VALVE - 51 ANTICAVITATION VALVE
5 RELIEF/REPLENISHING VALVE - HIGH LIFT ARM BY-PASS
36 VARIABLE CAPACITY DISPLACEMENT 52 PROPORTIONAL RELIEF VALVE –
PRESSURE: 5075 PSI (350 bar) 20 PILOTED ACTIVATED DIRECTIONAL (Fan Speed Regulator):
BI-DIRECTIONAL HYDROSTATIC PUMP
CONTROL VALVE - UNLOADING 1566 - 1784 PSI (108 - 123 bar)
6 RELIEF VALVE - CHARGE INLET: SPOOL 37 SHUTTLE RELIEF VALVE
360 PSI (24,8 bar) (Not Adjustable - Factory Set) 53 CHARGE PUMP -
at High Engine Idle 21 PILOTED ACTIVATED DIRECTIONAL 65 PSI (4,5 bar) 12.8 GPM (48,5 L/min) at High Engine Idle
With 140 degrees F. (60 degrees C.) Fluid CONTROL VALVE - FLOW CONTROL
SPOOL 54 CHECK VALVE - With 300 PSI (20,7 bar) Spring
38 FIXED CAPACITY DISPLACEMENT
7 FRONT AUXILIARY MANUAL with 0.016 inch (0,40 mm) orifice
22 FLOW DIVIDER ADJUSTMENT VALVE BI-DIRECTIONAL HYDROSTATIC
PRESSURE BLEED-OFF VALVE MOTOR 55 SOLENOID ACTIVATED CONTROL
8 VALVE - FORWARD/REVERSE
HYDRAULIC PUMP . . . . . . . Gear Type 23 SOLENOID ACTIVATED DIRECTIONAL 39 CHECK VALVE - With 80 PSI (5,5 bar) Spring 56 SERVO PISTON -Swash Plate
16.9 GPM (64 L/min.) at High Engine Idle
CONTROL VALVE - BASE
40 SOLENOID ACTIVATED DIRECTIONAL 57 POSITION SENSOR -Swash Plate
9 RELIEF VALVE - MAIN: 24 SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD CONTROL VALVE - BUCKET POSITION
3250-3350 PSI (224-231 bar) 58 CHARGE PRESSURE SENSOR
VALVE (ON/OFF)
at Front Quick Couplers
25 LOAD SHUTTLE VALVE - BLEED OFF 41 CHECK VALVE - BICS CONTROL VALVE
10 PORT RELIEF/ANTICAVITATION VALVE 59 SENSOR – CHARGE PRESSURE – Fan
3500 PSI (241,3 bar) 26 Filter
SOLENOID ACTIVATED DIRECTIONAL
42 RESTRICTION - 0.343 inch (8,7 mm) 60 SENSOR – HYD. TEMP. – Hyd. Filter
11 ANTICAVITATION VALVE CONTROL VALVE - TWO COIL
27 PILOT ACTIVATED DIRECTIONAL
12 SOLENOID ACTIVATED DIRECTIONAL CONTROL VALVE - REAR AUXILIARY 43 FILTER - Bob-Tach Valve
CONTROL VALVE - AUXILIARY
28 RESTRICTOR - 0.140 inch (3,6 mm)
13 PORT RELIEF/ANTICAVITATION VALVE: 44 PILOT ACTIVATED DIRECTIONAL
. . . . . (Optional) 29 RESTRICTOR - 0.031 inch (0,8 mm) CONTROL VALVE - HYDRAULIC
3500 PSI (241,3 bar) POWERED BOB-TACH
14 LOAD CHECK VALVE 30 RELIEF VALVE: 3300 PSI (228 bar) 45 RESTRICTION - 0.089 inch (2,26 mm)
15 LIFT CYLINDER SPOOL - MADE TO NOTE: Unless otherwise specified, springs have
31 FILTER - HYDRAULIC (CANISTER) 46 RESTRICTION - 0.025 inch (0,6 mm)
RESTRICT FLOW DURING BOOM NO significant pressure value.
DOWN BUT NOT DURING BOOM UP
V-1248legend (4-30-08)
Printed in U.S.A.
--- Page 13 ---
HYDRAULIC SYSTEM INFORMATION (CONT’D)
Glossary Of Hydraulic / Hydrostatic Symbols (Cont’d)
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
NON-RETURN VALVE, SHUTTLE VALVE: Valve which DIRECTIONAL CONTROL VALVE: Valve providing for
allows free flow in one direction only. the opening (fully or restricted) or the closing of one or
more flow paths (represented by several squares).
NON-RETURN VALVE (Check Valve) TWO PORTS and CLOSED FLOW
OUT IN - Used as Replenishing Valve, Lock PATHS
Check Valve or Anticavitation Valve -
Opens if the Inlet pressure is higher
than the Outlet pressure. Often SOLENOID ACTIVATED
contains internal spring which has NO DIRECTIONAL CONTROL VALVE
significant pressure value. (Two Position) - controlled by an
electric solenoid (with return spring).
SPRING LOADED VALVE (bypass
OUT IN Valve) - Opens if the Inlet pressure is PILOT ACTIVATED DIRECTIONAL