8
2.8 PUMP LUBRICATION
CAREFULLY TWIST AND PULL TO
REMOVE OIL RESERVOIR CAP. DO
NOT APPLY PRESSURE TO JOG CAP
FROM SIDE TO SIDE OR DIP STICK
MAY BREAK.
Oil is supplied for the average installation (ambient
temperature above 50°F (10°C). See recommen-
dation below for lower temperature. Fill pump and
gear box by slowly pouring the proper oil through
the reservoir opening until the oil level in the reser-
voir is level with the oil level mark on outside sur-
face of reservoir. Level can also be checked with
dipstick on oil reservoir cap. Recheck while pump
is operating.
DO NOT OVER FILL AS MOTOR DAM-
AGE CAN RESULT.
Recommended Oil
(Any equivalent oil is acceptable)
XT/XW gear ratios OTHER than
9.5:1 (model code 10) use: Mobil SHC-629
ISO Grade: 150
XT: gear ratio 9.5:1 (model code 10) use:
Oil Type
AGMA Spec No. 2 EP
Zurn Oil Co No. EP 35
ISO Grade 68
Nominal Oil Capacity
2.9 PIPING
General
Refer to Figure 6 for a diagram of a typical recom-
mended piping system.
Support all piping connections to the pump so that
no stress is placed on pump fittings. In no case
should the piping be sprung to make the connec-
tions to the pump. The suction and discharge car-
tridge pipe connections can be positioned within an
arc of approximately 150° to facilitate piping to
pump.
Flush and blow out all pipelines before connecting
the pump. This eliminates any foreign matter that
might seriously damage the internal working parts
of the liquid end. Install a 20 mesh Y-type strainer
that is sized to remove foreign particles with mini-
mum pressure drop in the suction line of the pump.
Install shut-off valves, with unions on the pump
side of the valves, in the suction and discharge
lines to facilitate servicing.
Suction Piping
The suction piping must be absolutely tight and
leak-free. For the XT/XW pump operating on
water-like solutions we recommend that the suction
pipe be 3/4” minimum diameter (much larger than
the connection size) and a maximum of 6 feet (2
meters) long. The intent is that the piping must be
designed to provide an adequate net positive suc-
tion head (NPSH). Obtain our NPSH Calculation
software at the Milton Roy Web site (milton-
roy.com). If assistance in determining NPSH is
needed, contact the Milton Roy Aftermarket Ser-
vice Department.
A flooded suction is recommended for optimum
service life and maintenance-free operation. How-
ever, the XT/XW pump can operate with less than
flooded suction if necessary, in accordance with
the following schedule shown in the chart below.
Pump Model Simplex
XT 1-1/4 Qts. (1.2 liters)
XW 3-1/4 Qts. (3 liters)
Model
Number
Min. NPSH
(PSIA)
Max. Lift (Ft. (meter)
H
2
O)
XT 9 10 (3)
XW 9 10 (3)
To Next Page
Loading...
Need help?
General
