Magnum Venus Plastech PATRIOT 4-1_4 PAT-PH-4250 - Manual (Page 21)

PAT-PH-4250 Series Powerhead Manual
Rev. 05/2012 Page | 21
INLET SPRING HOUSING (MPH-2541)
Pilot Valve Rebuild:
1. Remove the inlet spring housing (MPH-2541) from the upper end cap (PAT-PH-
4212).
2. Remove spring (MPH-2533) with inlet rod (MPH-2540). Turn the end cap over
and a small spring (MPH-2526) will fall out.
3. Replace O-ring (O-B-012) on the inlet spring housing (MPH-2541) and the O-ring
(O-U-006) on the inlet rod (MPH-2540). Coat O-rings and Springs with a light coat of
SUPERLUBE grease (SUPERLUBE). Set spring (MPH-2533) into the inlet spring
housing (MPH-2541) with inlet rod (MPH-2540) facing up. (see below)
4. Screw the inlet spring housing (MPH-2541) into the upper end cap. Do not install
the spring (MPH-2526) at this time it will be installed from the bottom.
5. Remove the stem seal (MPH-2511-01) from the bottom of the upper end cap (PAT-
PH-4212).
6. Remove the valve stem (MPH-2513) and seal guide (MPH-2512) with the spring
(MPH-2528).
7. Replace O-ring (O-B-012) on stem seal (MPH-2511-01) and coat O-ring and
stem seal
with SUPERLUBE grease (SUPERLUBE) . Drop the small spring (MPH-
NOTE: The two pilot valves in the upper and lower end caps are the
same. Start with the pilot valve in the upper end cap.
SPRING (MPH-2526)
INLET ROD (MPH-2540)
O-RING (O-U-006)
SPRING (MPH-2533)
O-RING (O-B-012)