U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-36
c. Drain measurement
[1] Travel motor
(Travel left) (Travel right)
1) Measuring procedure
1. Disconnect the drain hose of the travel motor
and plug the drain hose to prevent oil from
flowing out of the tank.
2. Connect another hose (a vinyl hose for low
pressure will do) to the travel motor drain port.
(Photo: Left travel motor U25-3)
3. Lift up the crawler and bring it into measurable
posture.
4. With the engine running at maximum rpm,
rotate the crawler for 1 minute and measure
the amount of hydraulic oil collected in a
container
5. Repeat the pressure measurement 3 times,
obtain the average and adopt it as measured
value.
Caution:
Be very careful not to put your hands and feet
under the crawler.
(1) Two-speed selector hose
(2) Travel forward/backward hose
(3) Motor drain hose
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