27
EATON
Series 1 Heavy Duty Hydrostatic Fixed Displacement Motors Parts and Repair E-MOPI-TS002-E September 2004
Assembly
Valve Block/
Integral Valves
23. Install O-rings and back-up
rings on valve block.
The high pressure ports require
an O-ring and back-up ring. The
O-ring goes on first, then the
back-up ring. The curved side of
ring goes toward the O-ring.
Install square-cut ring in low
pressure drain port of valve
block.
Note:
Be careful not to dam-
age O-rings and back-up rings.
Use clean petroleum jelly to
hold O-rings and back-up
rings in place during block
installation.
24. Position valve block on end
cover. Install four hex bolts.
Torque bolts 28 lb-ft [38 Nm].
Back-up Ring
O-Ring
25. Install two outer gauge port plug
assemblies.
Torque to 25 - 31 lb-ft [18 - 23 Nm].
Install center gauge port plug assem-
bly.
Torque to 40 - 48 lb-ft [30 - 35 Nm].
26. Lubricate and install shuttle spool and
shuttle valves. The smaller ends face
the center of the spool.
27. Install the shuttle valve springs and
plugs.
Torque to 68 - 82 lb-ft [50 - 60 Nm].
28. Install the low pressure relief valve
plunger and spring. Lubricate and
insert the shims in the relief valve
plug. Install the plug over the spring,
making sure the shims are not dis-
lodged. Screw the plug in and torque
to 68 - 82 lb-ft [50 - 60 Nm].
If your motor has an
integral shuttle and low
pressure relief valve,
go to step 25.
If you have a motor with a
valve block, continue with
step 23.
Motor with Integral
Shuttle and Low
Pressure Relief Valve
Motor with Valve Block
Shims
Low Pressure
Relief Valve
Shuttle
Valve
Gauge Port
Plugs
