Page 32 - Jet Pumping Station

Maintenance

DAILY CAUTION: Do not turn the drive shaft while the oil
reservoir is empty.
Check the oil level and the condition of the oil. The oil
level should be 1” from the top of the fill port - to the line Check the inlet pressure or vacuum periodically with a
on the oil fill plug’s dipstick (28). gauge.
Use the appropriate Wanner Hydra oil brand motor oil for CAUTION: Protect the pump from freezing. Refer
the applications - contact Wanner Engineering if in doubt. also to the “Shutdown Procedure.”
CAUTION: If you are losing oil but don’t see any
external leakage, or if the oil becomes discolored and SHUTDOWN PROCEDURE
contaminated, one of the diaphragms (22) may be During Freezing Temperatures
damaged. Refer to the Service Section. Do not operate
the pump with a damaged diaphragm. 1. Disconnect the inlet and outlet piping from the
CAUTION: Do not leave contaminated oil in the pump pump.
housing or leave the housing empty. Remove 2. Remove the drain plug (4) at the bottom center of
contaminated oil as soon as discovered, and replace it the manifold.
with clean oil.
3. Open any draincocks in the piping.
PERIODICALLY
4. Start the pump, and allow it to run until all fluid is
Change the oil after the first 100 hours of operation, and removed from the pump head.
every 500 operating hours thereafter. When changing,
remove the drain plug (34) at the bottom of the pump so all 5. Stop the pump, and reinstall the drain plug.
oil and accumulated sediment will drain out.
Service

This section explains how to disassemble and inspect all easily- c Remove the manifold (7).
serviceable parts of the pump. Repair procedures for the hydraulic d Inspect the manifold for warping or wear around the
end (oil reservoir) of the pump are included in a later section of the inlet and outlet ports. If wear is excessive, replace the
manual. manifold or return it to Wanner Engineering for
CAUTION: Do not disassemble the hydraulic end unless you resurfacing. To check if the manifold is warped,
are a skilled mechanic. For assistance, contact Wanner remove the O rings and place a straightedge across it.
Engineering (612) 332-5681 or the distributor in your area. A warped manifold should be replaced.
CAUTION: The four bolts (26) that screw through the back of e Remove the three socket head cap screws (39) with an
the housing into the cylinder casting hold the casting over the Allen wrench and remove the valve plate (18).
hydraulic end of the pump. Do not remove them except when f Inspect the valve plate in the same manner as the
repairing the hydraulic end. manifold.
1. Remove Manifold (7) and Valve Plate (18) 2. Inspect Valves (11-17)
a. Remove all nuts (31) and bolts (5) around the manifold. The three inlet and three outlet valve assemblies in the pump are
Do not remove the four bolts (26) that are installed identical (but face in opposite directions). Inspect each valve as
through the back of the pump housing. follows:
b. With a 3/8” hex Allen wrench, remove the centerbolt (1) a. Check the spring retainer (16), and replace if worn.
and its washer (2) in the center of the manifold.
b. Check the valve spring (14). If it is shorter than a new
CAUTION: Do not turn the pump drive shaft while the spring, replace it (don’t) just stretch the old spring).
manifold and valve plate are off the pump, except when
removing diaphragms or re-priming the hydraulic cells. c. Check the valve poppet (13). If worn excessively, replace
it.

30