Loader Bobcat 853, 853H. Manual - part 27

STEERING LEVERS (Cont’d)

Adjusting The Wheel RPM Left Compared To Right
Side

1. Loosen the bolts at the stop (Item 1) [A] and lower

the lever stops (both sides).

NOTE: This procedure is for MINOR adjustment in

full forward travel only. Steering neutral
setting must be correctly adjusted before
this procedure. Early S/N loaders do not have
this adjustment.

2. Start the engine.

Put jackstands under the front axles and rear
corners of the frame before running the engine
for service. Failure to use jackstands can allow
the machine to fall or move and cause injury or
death.

W–2017–0286

3. Check wheel RPM left and right side [B]. They

should be the same. If not, the stop (Item 1) [A] can
be used for MINOR adjustment. Bring the stop up
on the faster side until RPM is equal. (Tighten stop
before re–checking) tighten remaining side in down
position.

A

P–02875

1

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Service Manual

B

P–07959

STEERING LEVERS (Cont’d)

Hydrostatic Pump Neutral Adjustment

When working on the left side of the hydrostatic
pump, Be Careful to keep your fingers and tools
clear of the cooling fan belt.

After the hydrostatic pump has been rebuilt, the neutral
for the servo valve spool will have to be adjusted. Use the
following procedure:

NOTE: The hydrostatic pump must be installed in

the loader for this procedure.

1. Block the neutral spring bracket out with a large

socket (1–1/8 inch) so you can feel and see the
linkage neutral setting [A] & [B].

2. Loosen the bolt (Item 2) [D] for the neutral

adjustment bracket.

W–2185–0395

The following tool will be needed to do the following
procedure:

MEL1429A – Remote Start Switch

Lift and block the loader. (See Page 1–1.)

Raise the operator cab. (See Page 1–1.)

Connect the remote start switch. (See Page 1–1.)

The pump neutral adjustment bracket (Item 1) [C]
controls the position of the spool lever arm (Item 2) [C]
with a centering spring (Item 1) [D].

Inspect centering spring ends for damage or wear.
Replace the spring if there is excessive freeplay between
spool lever arm (Item 2) [C] and spring ends (Item 1) [D].

Never work on a machine with the lift arms up
unless the lift arms are secured by an approved
lift arm support device. Failure to use an
approved lift arm support device can allow the
lift arms or attachment to fall and cause injury
or death.

W–2059–0598

A

P–02866

C

P–07927

1

2

D

P–07928

1

2

1

853, 853H Loader

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Service Manual

B

MC–01944

Socket

Cam

D

P–02866

STEERING LEVERS (Cont’d)

Hydrostatic Pump Neutral Adjustment (Cont’d)

3. Clamp the control lever to the neutral adjustment

bracket with a small locking pliers [A].

4. Start the engine. With the engine running at full

RPM, move the control lever forward until the
wheels just begin to move. Mark the position on the
bracket (felt tip pen) [B].

5. Move the control lever in reverse until the wheels

just begin to move. Mark this position.

6. Stop the engine.

7. Position the neutral adjustment bracket between

the two marks and tighten the holddown bolt [C].
Remove the locking pliers. Start the engine and
check in both directions to be sure the pump will
return to neutral.

8. Remove the socket from blocking the neutral spring

bracket [D].

9. Adjust the steering neutral setting. (See Page

3–12.)

A

P–07929

C

P–07931

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Service Manual

B

P–07930

HYDROSTATIC MOTOR

Removal And Installation

Lift and block the loader. (See Page 1–1.)

Raise the operator cab. (See Page 1–1.)

Remove the front tire/wheel assembly.

Remove the four mounting bolts for the motor cover (Item
1) [A].

Remove the motor cover.

Mark the hoses for correct installation.

Disconnect the case drain hose (Item 1) [B].

Disconnect the high pressure hoses (Item 2) [B].

Remove the four mounting bolts (Item 1) [C] from the
motor.

Installation: Tighten the bolts to 65–70 ft.–lbs. (88–95
Nm) torque.

When making repairs on hydrostatic and
hydraulic systems, clean the work area before
disassembly and keep all parts clean. Always
use caps and plugs on hoses, tubelines and
ports to keep dirt out. Dirt can quickly damage
the system.

I–2003–0284

Never work on a machine with the lift arms up
unless the lift arms are secured by an approved
lift arm support device. Failure to use an
approved lift arm support device can allow the
lift arms or attachment to fall and cause injury
or death.

W–2059–0598

A

P–04804

1

C

P–04802

1

1

853, 853H Loader

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Service Manual

B

P–04801

1

2