HydraMaster RX20 NEXTGEN 120 VAC, Owner'S Manual, Page: 25 / 57

6-3: Owner’s Manual
restrict proper airflow and prolong drying
time).
12. Clean off any debris that may have
accumulated on the gear box shaft or
the inside threaded bore of the hub (see
Figure 6-5).
13. Lubricate the felt vacuum seal on top of the
hub with a quality, 30 weight SAE motor oil.
Also, put a few drops into the hub threads
(see Figure 6-6).
14. Coat the shaft with TKX
®
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