SECTION 4, Page 16
SJ-600 Series Engine Powered
112715
June 2001
HYDRAULIC SYSTEM
TROUBLESHOOTING INFORMATION
TROUBLE
PROBABLE CAUSE
REMEDY
1. Refill tank to proper level.
2. Check pump. Repair or replace if
defective.
3. Check coupler. Replace if defective.
4. Check valve. Replace if defective.
1. Check valve. Repair or replace if
defective.
2. Check valves. Replace if defective.
3. Check cylinder. Repair or replace if
defective.
1. Check valve. Repair or replace if
defective.
2. Check pump. Repair or replace if
defective.
3. Check valves. Clean or replace if
defective.
1. Check valve. Repair or replace if
defective.
2. Check pump. Repair or replace if
defective.
3. Check valves. Clean or replace if
defective.
1. Check valves. Repair or replace if
defective.
2. Check valve. Repair or replace if
defective.
3. Repair or replace balls. Refer to
Section 5 for proper location.
4. Check valve. Repair or replace if
defective.
5. Check motor. Repair or replace if
defective.
6. Check valve. Repair or replace if
defective.
7. Check cylinder. Repair or replace
if defective.
1. Check valve. Repair or replace if
defective.
2. Check valves. Clean or replace if
defective.
1. Check valve. Repair or replace if
defective.
2. Check valves. Clean or replace if
defective.
ALL FUNCTIONS
INOPERATIVE
1. Hydraulic oil level low.
2. Defective pump (P1).
3. Broken engine to pump coupler.
4. Relief valve (R1) open
1. Stuck or defective brake feed valve
(2H30A-2).
2. Stuck or defective steer right valve
(4H23A) or steer left valve (4H24A).
3. Steer cylinder (C7) damaged or
bypassing internally.
1. Small pump dump valve (2H18A)
stuck open.
2. Worn or defective small pump
section of pump (P1).
3. Check valve (CV1) or (CV2) stuck.
1. Large pump dump valve (2H17A)
stuck open.
2. Worn or defective large pump section
of pump (P1).
3. Check valve (CV1) or (CV2) stuck.
1. Stuck or defective drive reverse valve
(4H15B) or drive forward valve
(4H16B).
2. Defective motion control valve (MC1).
3. Missing or defective check balls in
series/parallel valve manifold
(3H20A).
4. Stuck or defective main series/parallel
valve spool (V3) in drive motor.
5. Defective drive motor (M1).
6. Free wheeling valve (2H30B) stuck.
7. Cushion cylinder (C8) bypassing
internally.
1. Stuck or defective drive valve
(4H15B).
2. Stuck or defective check valve in
motion control assembly (MC1).
1. Stuck or defective drive valve
(4H16B).
2. Stuck or defective check valve in
motion control assembly (MC1).
STEERING
INOPERATIVE
STEER AND FIRST
DRIVE SPEED
INOPERATIVE
LIFT AND SECOND
DRIVE SPEED
INOPERATIVE
DRIVE INOPERATIVE
REVERSE DRIVE
INOPERATIVE
FORWARD DRIVE
INOPERATIVE
Содержание SJ-7027
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