HydraMaster RX20 NEXTGEN 120 VAC, Owner'S Manual, Page: 50 / 57

9-3: Owner’s Manual
Locking Mechanism (Bushing Replacement)
If the locking mechanism becomes loose, tighten
it by following these simple steps:
1. Remove the cotter pin and dog point set screw
from the lock collar. (see Figure 9-4)
2. Hold onto the lock collar and spring while sliding
the pull rod out of the handle.
THE SPRING, 0.60OD X 7/8”LG COMPRESSION (000-155-107) HAS STORED ENERGY
FROM BEING COMPRESSED. USE EXTREME CAUTION WHEN REMOVING AND
INSTALLING IT
3. Carefully remove the SPRING, 0.60OD X 7/8”LG COMPRESSION (000-155-107) and
COLLAR, ROD LOCKING – RX20 (000-020-076) from their cavity in the lower handle
casting.
4. Using a flat blade screw driver between the flange and the casting, remove the
bushing.
5. Install a replacement bushing by carefully aligning the bushing in the hole and slowly
pressing it in using a flat washer to protect the flange and a pry-bar to push the bushing
into place or by using a 5/16” bolt, nut, and flat washers to pull it into place.
6. Temporarily insert the ROD, HANDLE ADJUSTING ASSEMBLY through the hole in the
upper rod support bracket, through the clearance hole in the lower casting and through
the bore of the bushing installed in step 6. Ensure that the rod slides completely through
and smoothly in the bore without binding. If the rod does not slide smoothly in the bore
or will not slide completely through the bore, remove the ROD, HANDLE ADJUSTING
ASSEMBLY and carefully and lightly ream the bushing bore until the rod assembly slides
through it without binding.
DO NOT REMOVE MORE MATERIAL FROM THE BORE THAN NECESSARY FOR THE
ROD TO SLIDE SMOOTHLY.
7. Remove any debris from reaming the bores and place SPRING (000-155-107) and
COLLAR, ROD LOCKING – RX20 in the pocket of the lower handle, above the bushing
flange and approximately centered them with the bushing bore.
8. Re-install the spring and lock collar in the casting and reinstall the rod into the handle until
it fully “seats” into one of the pockets in the latch plate.
Figure 9-4. Remove cotter pin and
remove dog point set screw
cotter pin
set screw