4
7
3
6
1
5
2
10
POWER TRIM - DESIGN II
Page 5B-22 90-884294 OCTOBER 2001
Troubleshooting
IMPORTANT: Determine if Electrical or Hydraulic problem exists.
IMPORTANT: Acceptable power trim leak down should not exceed 1 in. (25.4 mm)
(when measured at the tilt ram) in a 24 hour period.
HYDRAULIC SYSTEM TROUBLESHOOTING
CONDITION OF TRIM SYSTEM PROBLEM
A. Trim motor runs; trim system does not move up or down. 1, 5, 10, 11
B. Does not trim full down. Up trim OK. 3, 4, 5
C. Does not trim full up. Down trim OK. 1, 5
D. Partial or “Jerky” down/up. 1, 3
E. “Thump” noise when shifting. 3
F. Does not trim under load. 5, 8, 9
G. Does not hold trim position under load. 5, 6, 7
H. Trail out when backing off from high speed. 3, 4
I. Leaks down and does not hold trim. 5, 6, 7
J. Trim motor working hard and trims slow up and down. 8, 9
K. Trims up very slow. 1, 2, 5, 6, 8, 9
L. Starts to trim up from full down position when “IN” trim button is depressed. 3, 4
M. Trim position will not hold in reverse. 3, 4
PROBLEM
1. Low oil level.
2. Pump assembly faulty.
3. Tilt ram piston ball not seated (displaced, dirt).
4. Tilt ram piston O-ring leaking or cut.
5. Manual release valve leaking (check condition of O-rings) (Valve not fully closed).
6. Lower check valve not seating in port side trim ram.
7. Upper check valve not seating in port side trim ram.
8. Check condition of battery.
9. Replace motor assembly.
10. Broken motor/pump drive shaft.
11. Air pocket under pump.
External Mounted Hydraulic
System
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