HydraMaster RX-20 700-041-006, Owner'S Manual, Page: 25 / 52

6-3: Machine Maintenance
RX-20
Clean off any debris that may have 12.
accumulated on the gear box shaft or
the inside threaded bore of the hub (see
figure 6-5).
lubricate the felt vacuum seal on top of the
13.
hub with a quality, 30 weight SAE motor oil.
Also, put a few drops into the hub threads
(see figure 6-6).
Coat the shaft with TKX
14.
®
All-purpose lube
(HydraMaster p/N 000-087-006) or a similar
lubricant. Re-install the vacuum head assembly
onto the shaft by rotating it counter-clockwise
(figure 6-7).
An accumulation of debris in the gear box, if not
removed, may damage the gear box oil seal.
This will result in loss of oil in the gear box. If the
gear box is operated without oil, severe damage
may occur.
While rotating the vacuum head assembly in
the counter-clockwise position, make sure that
it spins freely all the way down. If it begins to
require the slightest finger tip pressure, unscrew
it and brush off the threads.
The smallest grain of dirt or sand will obstruct
the threads. If you turn too far onto a grain of
dirt, the hub may become locked onto the shaft
of the gear box.
Figure 6-5.
Clean Off Debris from
gear Box Shaft
Figure 6-6.
Lubricate Vacuum
Seal on Top of Hub
Figure 6-7.
Lubricate Shaft and
Re-install Head Assembly