Single Piston System - BRP Evinrude E-Tec Series Service Manual

Remove the manual release valve. Install pres-
sure gauge and adapter "B" to check problems in
the DOWN circuit. Cycle the unit down and up
several times to purge air. With all rods fully
extended, run the unit down momentarily to
reduce pressure. Check fluid level again, and
add fluid if necessary. Remember that all rods
must be completely extended to check fluid level.
Starting with the tilt cylinder fully extended, run the
unit DOWN.
The gauge should show 0 to 200 psi (0 to 1379
•
kPa) as the tilt cylinder is retracting.
The gauge should show approximately 800 psi
•
(5516 kPa) as the unit stalls.
Release the switch and watch for a pressure
•
drop. The stall pressure reading must not drop
more than 200 psi (1379 kPa) after motor stops.
If results vary from the above limits, there is a
problem in the DOWN circuit. Refer to MODES
OF OPERATION (Three Piston System) on
p. 359 for circuit description.
CAUTION
After tests are complete, run the unit up,
then down momentarily. Cycle the unit
down and up several times to purge air.
With all rods fully extended, run the unit
down momentarily to reduce pressure.
Check fluid level again and add fluid, if necessary.

Single Piston System

Use the following guidelines to check a single pis-
ton trim/tilt unit that is not working correctly.
Cylinder Leakdown:
Manual release valve seals
•
External leaks
•
No reverse lock:
External leaks
•
No operation, motor runs:
Manual release valve open
•
Fluid level low
•
Pump coupler
•
Hydraulic pump
•
No tilt down:
Manual release valve
•
Fluid level
•
Slow performance:
Manual release valve
•
Fluid level low
•
Mechanical binding
•
Electric motor
•
Hydraulic pump
•
Unit locked in tilt up:
Mechanical binding
•
Hydraulic pump
•
TRIM AND TILT
TROUBLESHOOTING
369
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