Standard procedures
This section offers the instruction on inspection and adjustment of motor components.
C
Caution
Contamination can damage internal components and void your warranty.
Take precautions to ensure system cleanliness when removing and reinstalling system lines.
1. With the prime mover off, thoroughly clean the outside of the motor.
2. If removing the motor, tag each hydraulic line. When you disconnect hydraulic lines, cap them and
plug each open port to prevent contamination.
3. Ensure the surrounding area is clean and free of contaminants like dirt and grime.
4. Inspect the system for contamination.
5. Check the hydraulic fluid for signs of contamination: oil discoloration, foam in the oil, sludge, or metal
particles.
6. If there are signs of contamination in the hydraulic fluid, replace all filters and drain the hydraulic
system. Flush the lines and refill the reservoir with the correct filtered hydraulic fluid.
7. Before re-installing the motor, test for leaks.
Speed sensor PPU adjustment
When installing or adjusting the speed sensor on a motor, it must be set at a specific distance from the
speed ring on the unit’s cylinder. To locate the position of the speed sensor on the unit or description see
the corresponding section.
1. Loosen the sensor lock nut with an 1
1
/
16
inch hex wrench.
2. Turn the sensor clockwise by hand until it contacts the speed ring.
3. Turn the sensor counterclockwise ½ turn (180°) to establish the nominal gap of 0.71 mm [0.028 in].
4. Then turn the sensor clockwise until the wrench flats on sensor body are positioned at a 22° angle to
the motor shaft center line.
Many adjustable wrenches have a 22° handle offset.
5. The final sensor position should be between ½ (180°) and ¼ turn (90°) counterclockwise from the
point where the sensor contacts the speed ring.
6. Hold sensor in position with a ½ inch hex wrench while tightening the lock nut to 13 N•m (10 lbf•ft).
Sensor PPU, KPP*13808
Connector
Target ring
200mm long
speed sensor wire
Sensor PPU,
KPP* 13808
(85) [3.346]
129.2 [5.087]
Black wire
Black wire
Red wire
Red wire
≈22º
≈22º
Magnetic target ring
Direction
signal high
Direction
signal low
Direction
signal high
Direction
signal low
Service Manual
TMM Transit Mixer Axial Piston Motor, Size 070/084/089
Adjustments
22
L1211037 • Rev AC • Apr 2014
