-10-
Figure 15
Make sure the Spacer ring between the seal and Bearing
is free floating (not binding).
Should the Main Needle Bearings in the Hydraulic Motor
need replacement, a new Body and/or End Plate, with the
Main Bearing already installed, must be used. If this
occurs, check other internal parts of the Motor for dam-
age and wear.
To Install the Shaft Assembly in the Motor Body
1.
Place the Shaft Assembly into the Motor Body bearing
bore with threaded end up (See Figure 14).
2.
On arbor press, place Body on arbor press fixture.
Make sure the surface edge of the fixture is smooth and
clean.
An un-threaded piece of pipe (1" dia. x 4" [25.4 mm x 101.6
mm] high) is needed to support the outer bearing race on
the shaft ball bearing. Place this pipe over the shaft and
press shaft assembly down until retaining ring can be
installed in its groove in the bearing core of the motor body
(Figure 15).
4.
Install the outer portion of the Gerotor, making sure the
Gerotor is centered within the O-ring groove on the Body.
5.
Install the Gerotor Housing, making sure the pins in the
Gerotor Housing line up with their respective holes in the
Body.
6.
Lightly lubricate the area between the Inner and Outer
Gerotor and the Outer Gerotor and Gerotor Housing with
hydraulic oil or mineral oil.
Special attention should be exercised when working with
retaining rings. Always wear safety goggles when work-
ing with spring or tension loaded fasteners or devices.
7.
Install O-ring on the motor end plate.
8. Place end plate on gerotor housing, making sure holes in
end plate line up with pins in the gerotor housing.
9.
Install four Socket Head Cap Screws in Motor End Plate
and, using a 1/4" Allen wrench, tighten Cap Screws alter-
nately and evenly, in a crisscross pattern to approximately
15 foot pounds [ 20 Nm] of torque.
10. Install the Thread Seal Gasket on the Bypass Adjusting
Screw. Put the Gasket on from the slotted end and turn until
four threads on the Screw are showing. Install the Washer
and the Nut. Install Bypass Adjusting Screw in the Motor
end plate.
A. For closed center hydraulic systems, turn the Bypass
Adjusting Screw in until it bottoms out in the End Plate.
Tighten nut down with 9/16" box end wrench.
B. For open center hydraulic systems, turn the Bypass
Adjusting Screw in until it bottoms out in the End Plate;
then turn back out 1
1
⁄
2
full turns. Holding the Bypass
Adjusting Screw with a screwdriver, tighten Nut. (Motor
will then have to be readjusted to tractor system.)
11. Replace O-ring on both port adapters.
12. Install Pressure Port Adapter and Tank Port Adapter back
onto the Motor. (For ease of installation, tighten the Pres-
sure Port Adapter first, then the Tank Port Adapter.)
13. Remove Hydraulic Motor from the vise. Turn Shaft by hand
to check for binding.
14. Install Slinger Ring over Motor Shaft.
15. Install Motor into Pump Mounting Flange. Insert four Hex
Head Bolts; then, alternately and evenly tighten them.
[For
polypropylene models secure the Hydraulic Motor to the
Mounting Flange with four Hex Head Cap Screws and
Nuts. The Nuts should be visible when the assembly is
complete.]
Figure 14
Reassembly of Remaining Hydraulic Motor Parts
1.
Place Motor Body in a vise with large end of Shaft facing up.
2.
Install the O-ring in the Body.
3.
Install the Woodruff Key or Roll Pin on the Shaft. Place the
Inner Gear of the Gerotor onto the Shaft making sure
Gerotor slot lines up with the key in the shaft.
The Woodruff Key can slide up behind the Inner Gear of the
Gerotor when the Gear is installed. Make sure the Key is
visible in the slot after the Gear is in place.
