Keep it clean
Cleanliness is a primary means of assuring satisfactory motor life on both new and repaired units.
Clean the outside of the motor thoroughly before disassembly. Take care to avoid contamination of the
system ports. Cleaning parts by using a clean solvent wash and air drying is usually adequate. As with any
precision equipment, you must keep all parts free of foreign material and chemicals. Protect all exposed
sealing surfaces and open cavities from damage and foreign material. If left unattended, cover the pump
with a protective layer of plastic.
Replace all O-rings and gaskets
We recommend you replace all O-rings and seals during service. Lightly lubricate O-rings with clean
petroleum jelly prior to assembly.
Secure the unit
For repair, place the unit in a stable position with the shaft pointing downward. It will be necessary to
secure the motor while removing and torquing fasteners and components.
Safety precautions
Always consider safety precautions before beginning a service procedure. Take the following general
precautions whenever servicing a hydraulic system:
Unintended machine movement
W
Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To protect against unintended movement, secure the machine or disable/disconnect the mechanism
while servicing.
Flammable cleaning solvents
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Warning
Some cleaning solvents are flammable. To avoid possible fire, do not use cleaning solvents in an area
where a source of ignition may be present.
Fluid under pressure
W
Warning
Escaping hydraulic fluid under pressure can have sufficient force to penetrate your skin causing serious
injury and/or infection. This fluid may also be hot enough to cause burns. Use caution when dealing with
hydraulic fluid under pressure. Relieve pressure in the system before removing hoses, fittings, gauges, or
components. Never use your hand or any other body part to check for leaks in a pressurized line. Seek
medical attention immediately if you are cut by hydraulic fluid.
Service Manual
TMM Transit Mixer Axial Piston Motor, Size 070/084/089
Introduction
L1211037 • Rev AC • Apr 2014
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