SERVICE REPAIR
R30XM2 R30XMA2 R30XMF2 [G118]
630 SRM 283
HFK300 and 400 Master Drive Unit
Description
Six capscrews fasten the large ball bearing and MDU
to the frame or axle plate. The bearing lets the MDU
turn for steering. There is a small helical pinion gear
on the motor armature shaft. This gear turns a large
helical gear on the shaft of the spiral bevel pinion in
the MDU. The spiral bevel pinion turns a spiral bevel
gear on the axle to turn the drive wheel. The brake
is fastened to the top end of the motor shaft to stop
rotation of the shaft. The brake action works through
the gears to stop the unit.
HFK300 and 400 Master Drive Unit
GENERAL
This manual has a description and the repair and
adjustment procedures for the parts of the master
drive unit (MDU) manufactured by Hurth.
See
Figure 1. This section is for the Hurth Models HFK
200 through 500. The traction motor, steering, and
brake repair procedures are in separate sections.
The main parts of the MDU are the case, pinion
(motor) and large gear set, the pinion and spiral
bevel gear set, bearings, and the axle and wheel.
The large ball bearing for steering is part of the
top case of the MDU. The traction motor fastens to
the MDU (Type A) on the following units: W40XL;
W60XL; B40XL; B60XL; C60XL; T5XL; TWR; R30F,
FA, FF, XM, XMA, XMF, XM2, XMA2, XMF2, and
XMS2. The traction motor and MDU turn as a
unit for steering. The traction motor fastens to an
adapter ring at the MDU (Type B) on the following
units: A1.00XL, A1.25XL, A1.50XL (A20XL, A25XL,
A30XL), N40EA, N50EA, N40ER, N45ER, N50FA,
N30FR, N40FR, N45FR, R30DH, R30E, R30EA,
R30EF, and R30ES. The adapter ring fastens to the
lift truck frame or steering axle. The MDU turns for
steering and the traction motor does not turn.
NOTE: Early A1.00-1.50XL (A20-30XL) units have a
Speth MDU. See the section Speth Master Drive
Unit 630 SRM 363.
There are three different types of MDUs used on the
lift truck models listed. The major differenc