SECTION 7
HIGH PRESSURE WATER
p. 7-28
80078868
Install Plunger Button Seals and Retainer Pins in Hydraulic Piston
1. Install new backup ring (7) and O-ring (8) in each internal groove in each
plunger pocket (2 places).
Failure to install backup ring can result in plunger being forced out of
plunger pocket.
2. Reinstall pins in piston, verifying that each pin moves freely without excess
side play in its cavity.
3. Reinstall band (6) over pins. Repeat this process for the opposite piston side.
With piston on bench, install plunger in each end of piston, checking snap-in
feature of plunger attachment. Use plunger removal tool to verify that pins
retract (release plunger) and close (retain plunger) in a uniform manner.
Install Hydraulic Piston Assembly into Hydraulic Cylinder
NOTE: Piston seal assembly must be compressed before the piston assembly will
slide into the hydraulic cylinder. A ring compression tool such as shown in
the figure below is recommended.
1. Check that hydraulic cylinder bore is free grit, or contamination, and that
the proximity switches are removed to prevent interference. Lubricate
piston bearing and seal surfaces with FML-2 (See Table 7-6) grease. Lightly
lubricate 2-3 inches of cylinder (15) bore with same grease.
2. Fit or drive piston assembly into ring compression tool (20). Position
compression tool with piston assembly over end of hydraulic cylinder. Using
a plastic- faced hammer so as not to damage piston surfaces, gently drive the
piston assembly into the hydraulic cylinder.
3. Remove seal compression tool, continue driving piston assembly into
hydraulic cylinder until it is between the proximity switch holes. Continue
intensifier re- assembly by installing cylinder heads, plungers, hydraulic seal
cartridges, and HP components.
To Next Page
Loading...
Need help?
General
