15-600 Page 10
OIL CAPACITIES
Pumps Without Heat Exchanger
Model
Cast Frame
Fabricated Frame
PZG
60 Gal. (227.1 Liters)
None
PZH
60 Gal. (227.1 Liters)
85 Gal. (321.8 Liters)
PZJ
70 Gal. (264.9 Liters)
105 Gal. (397.4 Liters)
PZK
85 Gal. (321.8 Liters)
100 Gal. (378.5 Liters)
PZL
85 Gal. (321.8 Liters)
100 Gal. (378.5 Liters)
PXL
85 Gal. (321.8 Liters)
None
Pumps With Heat Exchanger
Model
Cast Frame
Fabricated Frame
PZG
41 Gal. (155.2 Liters)
None
PZH
41 Gal. (155.2 Liters)
65 Gal. (321.8 Liters)
PZJ
50 Gal. (189.3 Liters)
85 Gal. (397.4 Liters)
PZK
85 Gal. (321.8 Liters)
None
PZL
85 Gal. (321.8 Liters)
None
PXL
85 Gal. (321.8 Liters)
None
Time between oil changes depends upon local and/or
operating conditions. Under normal circumstances, if
the crankcase is kept clean, it should not be necessary
to change the oil more than once in 1000 hours of
operation. Many operators change oil after each well
drilled. Oil should be changed if found to be dirty or
contaminated with mud or water, as the oil lubricated
roller bearings will be damaged by contamination. An
oil change is comparatively inexpensive, as the
approximate crankcase capacities are shown above.
In order to assure proper lubrication, the PZG, PZH &
PZJ pumps should not be run under 10 RPM for more
than a few minutes at a time without providing
additional lubrication from an extra external oil pump.
The PZK, PZL & PXL pumps should not be run under
40 RPM.
The oils normally used in large mud pumps are quite
viscous at lower temperatures. When starting cold, the
pump should be started slowly and brought up to
operating speed slowly. This practice will assure
proper lubrication of all working parts before pump is
fully loaded.
OIL FILTER
- A replaceable element oil filter is located
inside the pump crankcase. Filter mounting flange is on
oil is changed or every 1000 hours of operation. Filter
element is protected from excessive internal oil
pressure by a relief valve between it and the oil pump.
Filter element should be replaced each time crankcase
oil is changed or every 1,000 hours of operation. The
filter element is protected from excessive internal oil
pressure by a relief valve between it and the oil pump.
On units equipped with a heat exchanger, oil flows
through the oil filter before going through the heat
exchanger.
FIGURE 5 – OIL FILTER MOUNTING
HEAT EXCHANGER
(Optional Equipment)
- For PZ
series & PXL pumps a bronze heat exchanger can be
provided to keep crankcase oil temperature at 160°
F
(71.1°
C) by means of an automatic water control
valve. This valve has a sensing probe in the crankcase
oil, and it monitors water to the heat exchanger to
maintain oil temperature within close limits.
Water must be drained from the heat exchanger during
freezing weather. Ruptured water tubes will admit
water into the oil, with resulting damage to working
parts of the pump.
Cooling water can be drained from the heat exchanger
by removing water connections and blowing
compressed air into upper opening. Water will then
flow from the lower opening. Air is necessary, as water
will not otherwise drain due to small size of tubes,
capillary attraction, and the horizontal position of the
heat exchanger mounting.
Water should not be admitted to the heat exchanger as
long as oil temperatures do not exceed 160°
F(71.1°
C). A dial thermometer is standard equipment on all PZ
series and PXL pumps.
Salt water can be used for cooling. Zinc anode plugs
are provided for corrosion protection. These plugs are
to be replaced when they have been corroded away.
DIRECTION OF ROTATION
- The PZ series & PXL
pumps MUST be driven in the direction as shown by
arrow on sectional view, outline drawing and on pump
frame. The oil pump on PZG, PZH and PZJ models is
a nonreversible pump without adjustments described in
“Lube Oil Pump”, page 24.
