John Deere 318 - Manual (Page 362)

A
MACHINE MOVES IN ONE DIRECTION ONLY
• Inspect transmission control linkage for wear or damage. See Section 50.
• 316 and 318; Test for debris in check valves: GO TO ‘
• Inspect check valves for damaged valve seat, seals or stuck check ball. See Section 50.
• Inspect internal transmission components for wear or damage. See Section 50.
B
MACHINE WILL NOT MOVE IN EITHER DIRECTION
• Inspect transmission control linkage for wear or damage. See Section 50.
• Inspect transmission drive shaft and crankshaft pulley for loose cap screws or damage.
• Check for improper charge pump installation (180 degrees off). See Section 50.
• Test charge pump pressure: GO TO Æ
• Inspect check valves for damaged valve seat, seals or stuck check ball. See Section 50.
• Inspect internal rotating group for scoring and wear (slippers, pistons and cylinder block, valve plate and
cylinder block). If internal damage is found, check for missing welch plug: GO TO
Ò
C
TRANSMISSION OPERATION HAS ERRATIC OR LOW POWER OR SPEED WILL
NOT INCREASE
• Inspect brakes and brake linkage for wear or damage. See Section 60.
• Inspect transmission control linkage for wear or damage. See Section 50.
• Check for improper charge pump installation (180 degrees off). See Section 50.
• Test charge pump pressure: GO TO Æ
• Inspect check valves for damaged valve seat, seals or stuck check ball. See Section 50.
• Inspect internal rotating group for scoring and wear (slippers, pistons and cylinder block, valve plate and
cylinder block). If internal damage is found, check for missing welch plug: GO TO
Ò
• Check for dirt accumulation on transmission causing transmission oil to overheat: GO TO Õ
• Check for high draft loads causing transmission oil to overheat: GO TO Õ
MX,159025015,3 -19-20APR95
MX,159025015,4 -19-20APR95
MX,159025015,5 -19-20APR95
Diagnosis, Tests and Adjustments/Troubleshooting Guide
TM1590 (17MAY95)
250-15-2
316, 318 & 420 Lawn and Garden Tractors
020895
250
15
2