TM 5-1940-277-34
TROUBLESHOOTING TEST FOR TRANSMISSION
(continued)
LOCATION
ITEM
ACTION
REMARKS
TEST PROCEDURE
NOTE
Boat must be operated 10 - 15 minutes to allow transmission oil to reach normal temperature
before starting test. Then stop engines.
1.
Using 5/16 in hex key wrench, remove 3/8 in pipe plug line pressure tap located above regulator valve.
2.
Connect hydraulic pressure gage to line pressure tap.
NOTE
Transmission must be in neutral for first test.
3.
Start engine.
4.
Follow chart rpm/pressure checks for neutral. If reading is low refer to troubleshooting procedure.
Engine RPM1
Neutral
Forward/Reverse
Min
Max
Min
Max
700
90 psi
120 psi
90 psi
120 psi
2000
-
-
100 psi
125 psi
5.
While watching pressure gage shift from neutral to forward. If pressure drops and stays low there is leakage in the
forward clutch or its circuits.
6.
Stop engine.
7.
Using 5/16 in hex key wrench, disconnect gage from line pressure tap and install 3/8 in pipe plug.
8.
Using 13/64 in hex key wrench, remove 1/8 in reverse clutch pressure plug from adapter tap.
9.
Connect hydraulic gage to reverse clutch pressure tap.
Change 1
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