MIO-R45XRFR4836 Rev E
G&B Specialties Inc. 535 West 3
rd
Street, Berwick, PA, USA Tel: (570) 752-5901 Fax: (570) 752-6397
US Field Service: 570-441-6988; CAN Field Service 570-854-0482; www.rafna.com
-14-
R
AIL
W
HEEL
B
EARING
A
DJUSTMENT
The rail wheel bearings require periodic adjustment in order to keep the end-play within
specification. If the rail wheel bearings are not correctly adjusted, failure may occur that will
not be covered under the railgear warranty. Check and adjust the bearing end-play with the
railgear in the road position and with the rail wheels free to turn.
Use a magnetic base dial gauge to measure the end-play of each rail wheel bearing. The
bearing end-play must be between 0.001” and 0.005”. If this is not the case, adjust as
follows:
1.
Remove the rail wheel hubcap and gasket by removing the three 1/4” bolts and 1/4” lock
washers.
2.
Remove the spindle nut cotter pin.
3.
Ensure that the wheel bearing cavity is full of grease.
4.
While rotating the rail wheel forward, torque the spindle nut to 20 ft-lbs. Then loosen the
spindle nut and re-torque it to 6 ft-lbs. Re-check and re-adjust the bearing end-play if
required. If no torque wrench is available, tighten the spindle nut until the rail wheel is
difficult to turn by hand. Then loosen the spindle nut and retighten it just until no
looseness can be felt in the bearings. Re-adjust the bearing end-play with a torque wrench
as soon as possible.
5.
Install a new 3/16” x 2” long cotter pin through the spindle nut. Tighten the spindle nut
slightly if needed to insert the cotter pin.
6.
Re-install the hubcap and gasket using the 1/4” bolts and new 1/4” lock washers. Blue
Loctite can be used on the bolts as an added safety measure. Tighten and torque the 1/4”
fasteners to 12 ft-lbs dry. Do not over torque.
R
AIL
S
WEEP
A
DJUSTMENT
The distance between the rail sweep rubber and the rail is adjustable and should be
maintained at approximately 1/8”. To adjust the rail sweep rubber, with the railgear in the
rail position, loosen the two 1/4” fasteners which secure the rail sweep rubber to the rail
sweep bracket. Slide the rail sweep rubber up or down for the correct clearance. Tighten and
torque the ¼” fasteners to 12 ft-lbs dry. Do not over torque.