G&B Specialties Inc.
535 West 3
rd
Street, Berwick, PA, USA Tel: 1-570-752-5901 Fax: (570) 752-639
1.0
R
AIL
W
HEEL
B
EARING
A
DJUSTMENT
The rail wheel bearings require periodic adjustment in order to keep the endplay within
specification. If the rail wheel bearings are not correctly adjusted, failure may occur and
will not be covered under the Rafna Industries Warranty.
The following procedure details the adjustment of the rail wheel bearings (refer to figure
3-1):
WARNING:
Before any maintenance or adjustments are performed under the vehicle
or railgear, ensure the engine is turned off and the parking brake is set.
1.
Perform this procedure with the railgear in the highway position and with the rail
wheels free to turn. If necessary, lower the railgear to ease access, but ensure the
railgear axle is supported.
2.
Using a magnetic base dial gauge measure the endplay of each rail wheel bearing.
3.
Compare the above readings with the specifications in table 3-1 below.
Table 3-1: Rail Wheel Endplay Specifications
Minimum
Maximum
Endplay
0.001”
0.005”
4.
If rail wheel bearing endplay is not within specifications, proceed to adjust as follows.
5.
Access the rail wheel bearings: Remove the wheel hub cap (Item 1) and gasket (Item
2) by unbolting the three hub cap retaining bolts (Item 3).
6.
Adjust the rail wheel bearing:
a)
Unbend the lock washer (Item 4) tab. Remove the lock nut (Item 5) and lock
washer.
b)
While rotating the rail wheel forward, torque the spindle nut (Item 6) to 12 ft-lbs.
c)
Slightly loosen the spindle nut.
d)
Re-torque the spindle nut to 6 ft-lbs.
e)
Recheck endplay and re-adjust if required.
f)
Re-install the lock washer and lock nut. Tighten the lock nut against the spindle
nut and bend the lock washer tab to lock the nuts.
g)
Ensure the wheel bearing cavity is full of grease. Refer to the Routine Railgear
Service section of this manual for lubrication points.
h)
Re-install the gasket, the hub cap, the bolts and lock washers (Item 7). Torque the
hub cap retaining bolts to specifications.
Summary of Contents for R-150
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