MAINTENANCE

SYMPTOMS

 

CAUSE

 

REMEDY

Oil Temperature rises

1.

Low oil level

1.

Bring oil to proper level

above 200 deg. F

2.

Kinked or blocked 2.

Inspect, Repair, or Replace

 

 

hoses

 

 

 

3.

Worn pump/motor3.

Disable and repair

Mower will not start

1.

Blown fuse

1.

Check fuse between mower switch

or run

 

 

 

and ignition / replace

 

2.

Ball valves closed 2.

Make sure valves are open

 

3.

Low oil level

3.

Check Hyd. tank and fill

 

4.

Line leak

4.

Check all fittings and lines.

 

5.

Electronic

5a.

Without the tractor running, turn

 

 

solenoid faulty

 

the mower switch to on. A low

 

 

 

 

audible click should be heard if the

 

 

 

 

solenoid is engaging the solenoid

 

 

 

 

spool. If click is not heard, leave

 

 

 

 

switch in on position and with a

 

 

 

 

screwdriver or other steel object,

 

 

 

 

touch the small nut on the end of the

 

 

 

 

solenoid. If the metallic object is not

 

 

 

 

attracted to the nut, check the fuse

 

 

 

 

and wiring for an open circuit. If the

 

 

 

 

object is attracted but no “click” is

 

 

 

 

heard, replace the solenoid.

 

 

 

5b.

Remove the four bolts holding the

 

 

 

 

small block to the main block. Lift

 

 

 

 

and remove small block being

 

 

 

 

careful not to damage O-rings / filter.

 

 

 

 

Clean filter and re-install.

 

 

 

5c.

Remove large nut on side of large

 

 

 

 

valve block. Remove spring, and use

 

 

 

 

needle nose vise grip to pull spool from

 

 

 

 

block. Check block and spool for

 

 

 

 

contaminates and scratches. Clean

 

 

 

 

parts or replace if scratched.

Motor runs but

1.

Belts

1.

Inspect belts and pulleys. Replace

 

 

 

 

belts and repair as needed.

 

2.

Tensioner

2.

Adjust tensioner nut until flat washer is

 

 

 

 

flush with top of guide.

Motor turns slowly

1.

Contaminants

1.

Remove large nut on side of large

or not at all.

 

restricting spool

 

valve block. Remove spring, and use

 

 

 

 

movement in needle nose vise grip to

 

 

 

 

pull spool valve body from block.

 

 

 

 

Check block and spool for

 

 

 

 

contaminates and scratches. Clean

 

 

 

 

parts or replace if scratched.

 

2.

Suction lines

2.

Check for kinkes or obstruction in

 

 

 

 

obstructed suction hose

 

3.

Low oil level

3.

Check Hyd. tank level and fill

Pump will not work

1.

Excessive wear

1.

Disassemble and repair.

 

 

on internal parts

 

 

Maintenance Section 4-5

Page 66 Page 68
Page 67
Image 67
Tiger Products Co., Ltd JD 72-7520 manual Oil Temperature rises
Page 66 Page 68

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