15-600 Page 11
Running the pump in the prescribed direction insures
proper lubrication and quiet operation as the load on
the crosshead will be carried on the lower side.
CROSSHEAD DRAINS
- PZ series & PXL pumps are
equipped with two plugged drain openings below and
in front of the crossheads. These openings are to drain
any possible leakage from the oil stop head packings
which collects in a small reservoir built into the frame.
This area should be drained daily.
It is recommended that these openings be piped
together and a valve installed to simplify the daily
draining. Failure to drain this area could result in
drilling mud in the power end and possible premature
failure.
OPERATION
- For normal drilling operation, the
pumps are to be run at the ratings listed on pages 12
thru 15. In no case should pressure exceed that shown
for each diameter piston - to do so would subject
working parts to operating loads in excess of those for
which they were designed, resulting in reduced life.
MAINTENANCE SCHEDULE FOR GARDNER DENVER “PZ” SERIES AND “PXL” PUMPS:
Daily:
1.
Inspect condition of piston and liners. They should
be run until leakage of fluid is visible or becomes
excessive.
2.
Clean inside frame cradle.
3.
Clean and refill piston wash tank after excessive
contamination.
4.
Check piston wash baffle, make certain nozzles
are not clogged.
5.
Check pulsation dampener for proper charge.
Weekly:
1.
Remove valve covers and gaskets. Replace if cut
or warn.
2.
Check fluid valves and seats for wear. Replace
cut or worn inserts and valves.
3.
Inspect urethane bushing in suction and
discharge valve guides and replace if worn.
4.
Inspect piston locknut. Replace if damaged,
corroded, or if nylon locking insert has lost its
effectiveness. Nut should be used only three
times and then replaced. Do not overtighten nuts.
Every Two Weeks:
1.
Remove valve cover locks. Clean threads on
locks and rings. Coat threads with moly coat
thread compound or heavy-duty lead base thread
compound. Replace if they are worn or cracked.
Monthly:
1.
Check all fluid cylinder studs and nuts for
tightness.
2.
Remove and clean discharge cross strainer.
3.
Check condition of oil stop head seals and
replace if worn or leaking excessively.
Every 1000 Hours:
1.
Clean frame oil drain magnet during oil change.
2.
Clean frame oil drain plug magnets located in
front of crossheads and clean the oil passage.
3.
Clean inside frame during regular oil change.
Every 6 Months:
1.
Replace oil stop head seals even though leakage
is not evident.
