Maintenance, Maintenance schedule, Check safety – Gravely 988117 - HR1536FX User Manual

Page 17: Interlock system, Check safety interlock system

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TO PUSH UNIT BY HAND

To move the unit without the engine running:

1. Rotate the bypass valve levers located on the

back side of the pumps approximately 1/2 turn
counterclockwise.

2. Release parking brake.

3. Push unit to desired location.

4. Rotate the bypass valve levers located on the

back side of the pumps approximately 1/2 turn
clockwise to operate the unit.

IMPORTANT: Towing the unit will damage hydraulic
motors.

TO TRANSPORT UNIT

ALWAYS shut off engine, remove key and drain fuel
when transporting unit on a truck or trailer. Use extra
care when loading or unloading unit.

Engage parking brake.

Secure unit chassis to transport vehicle. NEVER
secure from rods or linkages that could be damaged.

DO NOT transport machine while engine is running.

*

Change oil after first 8 hours of operation and every

100 hours thereafter.

**

Change Hydraulic Fluid after first 50 hours of

operation and every 500 hours thereafter.

CHECK SAFETY INTERLOCK SYSTEM

Test the safety interlock system at each operation. If
the system does not function properly, do not operate
the unit until repairs are made.

988105, 106, 107, 108, 109, 113

To test:

1. With engine off, set controls as listed in line A of

the table below.

2. Turn electric start model ignition switch to Start.

Engine must not crank.

3. Turn ignition switch to On. Pull recoil start handle.

Engine must not start.

4. Repeat steps 1-3 for lines B-D of the table below.

5. Shut off the unit, if necessary. See Shut Off and

"To stop mowing."

IMPORTANT: If the system does not function properly,
do not operate the unit until repairs are made.

NOTE: Control settings that prevent engine starting will
stop a running engine.

MAINTENANCE

WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.

MAINTENANCE SCHEDULE

Each

Use

25

50

100

500

Check Safety Interlock

System

•

Check Air Cleaner

•

Check Engine Oil

•

Check Engine Cooling

•

Check Fasteners

•

Check Tire Pressure

•

Check Hydraulic Fluid

Level

•

Check Battery

•

Check All Belts

•

Mower Blades

•

Clean Air Cleaner Foam

Element

•

General Lubrication

•

Change Engine Oil

*

•

Check Fuel Filter

•

Check Spark Plug

•

Check Muffler

•

Clean Air Cleaner Paper

Element

•

Change Hydraulic Fluid

and Filter

**

•

PT

O

P

ARKING BRAKE

SPEED CONTR

OL

LEVERS IN NEUTRAL

KEY

OPERA

T

OR PRESENCE

CONTR

OL

ENGINE

A

Off

On

No

On

Off

Off

B

Off

Off

Yes

On

Off

Off

C

On

On

Yes

On

Off

Off

D

Off

On

No

On

On

Off

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