John Deere 318 - Manual (Page 427)

B
LOW OR SLOW HYDRAULIC POWER
• Check for dented or restricted lines.
• Check for proper engine speed. See Section 220.
• Test charge pump pressure. See Section 250.
• Check for plugged oil filter.
• Check suction line for air leaks. See Section 250.
• Test implement relief valve pressure. See Section 250.
• Test control valve for leakage. GO TO Å
• Inspect cylinder packings for excessive wear. GO TO Æ
C
HYDRAULIC SYSTEM OPERATES ERRATICALLY
• Bleed hydraulic system. GO TO Ö
• Check for restricted lines.
• Test charge pump pressure. See Section 250.
• Check for plugged oil filter.
• Check suction line for air leaks. See Section 250.
• Check for dirt in implement relief valve. See Section 50.
D
LOAD DROPS WITH CONTROL VALVE IN NEUTRAL POSITION
• Check lines from control valve to rockshaft cylinder for leakage.
• Check control valve for centering when released.
• Check implement relief valve for leakage. See Section 250.
• Test control valve for leakage. GO TO Å
• Check cylinder packings and O-rings for leakage. GO TO Æ
MX,159027020,4 -19-24APR95
MX,159027020,5 -19-24APR95
MX,159027020,6 -19-24APR95
Diagnosis, Tests and Adjustments/Troubleshooting Guide
TM1590 (17MAY95)
270-20-3
316, 318 & 420 Lawn and Garden Tractors
020895
270
20
3