5
6 Remove new piston cup(s) from protective cardboard packaging. Set new piston cups
onto retainer plate, these parts will sit flat against each other.
7 Press retainer plate with piston cup into cylinder all the way to the piston. The cylinder
can be rotated to align the screw holes. Apply thread locking compound (Loctite
®
222)
to retainer screws, torque screws to 10-13 inch-pounds.
8 Remove the cylinder o-ring(s) from the bottom of valve plate(s) and install new o-rings.
9 Inspect leaf valves for damage or wear. NOTE: There is one intentionally “bent” leaf
valve per set. If leaf valves need to be replaced, a complete leaf valve plate can be
ordered. The screws holding the leaf valves are susceptible to breaking which makes
individual leaf valve replacement very difficult. Complete valve plate assemblies:
SRC25VP for SRC25 units; SRC50VP for SRC50 units.
10 Check that orientation of the valve plate(s) with ports is correct and place over
cylinders.
11 Remove old and install new head o-rings in the o-ring grooves on top of valve plate.
12 Reinstall head over valve plate(s) checking that orientation with ports is correct. Torque
screws to 50 inch-pounds.
Check that all external accessories such as relief valves
and gauges are not damaged before re-operating product.
TROUBLESHOOTING - ALL UNITS:
Low High Excess Over Won’t
Pressure Pressure Noise Heating Start
Possible cause and solution
x x x Filter
dirty
Clean or replace
x
x
x
x
Dirty muffler
Clean or replace
x
Dirty valves
Clean or replace
x Bent/damaged
valves
Replace
x
x
Damaged/worn cup
Replace
x
x
Leaky hose
Fix or replace
x
x
Leaky check valve
Fix or replace
x
x
x
Plugged vacuum or pressure line
Fix or replace
x
x
Low voltage
Inspect power supply*
x
Leaky relief valve
Fix or replace
x
x
Motor not wired correctly. Check
wiring diagram and line voltage*
* To troubleshoot low voltage, unit can be tried in an outlet closer to the breaker panel. Voltage drop
in longer electrical runs can cause low voltage.
