TORQUE CHART
Pump Item
Torque
Pump Model
Thread
Tool Size [P/N]
in. lbs.
ft. lbs.
Nm
Plunger Retainer
1851, 1861
M6
M12 Hex
55
4.6
6.2
Valve Block Manifold Screws
1851, 1861
M12
M10 Allen [33047]
355
30.0
40
Discharge Manifold Nuts
1851, 1861
M10
M17 Hex [25083]
250
21.0
28
Rear Cover/Bearing Cover Screws
1851, 1861
M6
M10 Hex [25082]
50
4.0
5.4
Connecting Rod Screws
1851, 1861
M8
M13 Hex [25324]
216
18
24
Bubble Oil Gauge
1851, 1861
M28 Oil Gauge Tool [44050]
45
3.6
5.0
PREVENTATIVE MAINTENANCE CHECK-LIST
Check
Daily Weekly 50 hrs. 500 hrs.* 1500 hrs.** 3000 hrs.**
Clean Filters
x
Oil Level/Quality
x
Oil Leaks
x
Water Leaks
x
Belts, Pulley
x
Plumbing
x
Initial Oil Change
x
Oil Change
x
Seal Change
x
Valve Change
x
Accessories
x
TECHNICAL BULLETIN REFERENCE CHART
No.
Subject
Models
002
Inlet Pressure VS Liquid Temperature
All Models
003
Power Unit Drive Packages
3PFR - 68PFR, 10FR - 60FR
024
Lubrication of Lo-Pressure Seals
All Models
035
Servicing Crankcase Section
7PFR - 60PFR
036
Cylinder and Plunger Reference Chart
All Models
043
LPS and HPS Servicing
All Plunger Models
053
Liquid Gasket
All Plunger NAB-S.S. Models
064
By-Pass Hose Sizing
All Unloaders/Regulators
074
Torque Chart
Piston and Plunger Pumps
077
Oil Drain Kit
All Models (except 2SF/4SF)
083
Winterizing a Pump
All Models
089
Machined Valves
15PFR and 18PFR
* If other than CAT PUMPS special multi-viscosity ISO68 oil is used,
change cycle should be every 300 hours.
** Each system’s maintenance cycle will be exclusive. If system per-
formance decreases, check immediately. If no wear at 1500 hours,
check again at 2000 hours and each 500 hours until wear is ob-
served. Valves typically require changing every other seal change.
Duty cycle, temperature, quality of pumped liquid and inlet feed
conditions all effect the life of pump wear parts and service cycle.
** Remember to service the regulator/unloader at each seal servicing
and check all system accessories and connections before resuming
operation.
Refer to video for additional assistance.
INLET CONDITION CHECK-LIST
Review Before Start-Up
Inadequate inlet conditions can cause serious malfunctions in the best designed
pump. Surprisingly, the simplest of things can cause the most severe problems or go
unnoticed to the unfamiliar or untrained eye. REVIEW THIS CHECK-LIST BEFORE
OPERATION OF ANY SYSTEM. Remember, no two systems are alike, so there can
be no ONE best way to set-up a system. All factors must be carefully considered.
INLET SUPPLY should exceed the maximum flow being delivered by the pump to
assure proper performance.
❏
Open inlet shut-off valve and turn on water supply to avoid starving pump.
DO NOT RUN PUMP DRY.
❏
Temperatures above 130°F are permissible. Add 1/2 PSI inlet pressure per each
degree F over 130°F. Elastomer or RPM changes may be required. See Tech
Bulletin 002 or call CAT PUMPS for recommendations.
❏
Avoid closed loop systems especially with high temperature, ultra-high pressure
or large volumes. Conditions vary with regulating/unloader valve.
❏
Low vapor pressure liquids, such as solvents, require a booster pump and C. A.T.
to maintain adequate inlet supply.
❏
Higher viscosity liquids require a positive head and a C. A.T. to assure adequate
inlet supply.
❏
Higher temperature liquids tend to vaporize and require positive heads and
C. A.T. to assure adequate inlet supply.
❏
When using an inlet supply reservoir, size it to provide adequate liquid to accom-
modate the maximum output of the pump, generally a minimum of 6-10 times the
GPM (however, a combination of system factors can change this requirement);
provide adequate baffling in the tank to eliminate air bubbles and turbulence;
install diffusers on all return lines to the tank.
INLET LINE SIZE should be adequate to avoid starving the pump.
❏
Line size must be a minimum of one size larger than the pump inlet fitting. Avoid
tees, 90 degree elbows or valves in the inlet line of the pump to reduce the risk of
flow restriction and cavitation.
❏
The line MUST be a FLEXIBLE hose, NOT a rigid pipe, and reinforced on SUCTION
systems to avoid collapsing.
❏
The simpler the inlet plumbing the less the potential for problems. Keep the
length to a minimum, the number of elbows and joints to a minimum (ideally no
elbows) and the inlet accessories to a minimum.
❏
Use pipe sealant to assure air-tight, positive sealing pipe joints.
INLET PRESSURE should fall within the specifications of the pump.
❏
Acceleration loss of liquids may be increased by high RPM, high temperatures,
low vapor pressures or high viscosity and may require pressurized inlet and
C. A.T. to maintain adequate inlet supply. DO NOT USE C.A.T. WITH SUCTION
INLET.
❏
Optimum pump performance is obtained with +20 PSI (1.4 BAR) inlet pressure
and a C. A.T. for certain applications. With adequate inlet plumbing, most pumps
will perform with flooded suction. Maximum inlet pressure is 60 PSI (4 BAR).
❏
After prolonged storage, pump should be rotated by hand and purged of air to
facilitate priming. Disconnect the discharge port and allow liquid to pass through
pump and measure flow.
❏
“K” versions are suitable for high inlet pressures. Consult CAT PUMPS.
INLET ACCESSORIES are designed to protect against over pressurization, control
inlet flow, contamination or temperature and provide ease of servicing.
❏
A shut-off valve is recommended to facilitate maintenance.
❏
Installation of a C. A.T. is essential in applications with stressful conditions such
as high temperatures, booster pump feed or long inlet lines. Do not use C. A.T.
with negative inlet pressure.
❏
A stand pipe can be used in some applications to help maintain a positive head
at the pump inlet line.
❏
Inspect and clean inlet filters on a regular schedule to avoid flow restriction.
❏
A pressure transducer is necessary to accurately read inlet pressure. Short
term, intermittent cavitation will not register on a standard gauge.
❏
All accessories should be sized to avoid restricting the inlet flow.
❏
All accessories should be compatible with the solution being pumped to prevent
premature failure or malfunction.
❏
Optional inlet protection can be achieved by installing a pressure cut off switch
between the inlet filter and the pump to shut off pump when there is no positive
inlet pressure.
❏
“K” versions are suitable for high temperatures and containment of harmful
liquids. Consult CAT PUMPS for optional flushing and cooling accessory.
BY-PASS TO INLET Care should be exercised when deciding the method of by-pass
from control valves.
❏
It is recommended the by-pass be directed to a baffled reservoir tank, with at
least one baffle between the by-pass line and the inlet line to the pump.
❏
Although not recommended, by-pass liquid may be returned to the inlet line of the
pump if the system is properly designed to protect your pump. When a pulsation
dampener is used, a PRESSURE REDUCING VALVE must be installed on the
inlet line (BETWEEN THE BY-PASS CONNECTION AND THE INLET TO THE
PUMP) to avoid excessive pressure to the inlet of the pump. It is also recommend-
ed that a THERMO VALVE be used in the by-pass line to monitor the temperature
build-up in the by-pass loop to avoid premature seal failure.
❏
A reinforced, flexible, low pressure hose rated up to 300 PSI should be used for
routing by-pass back to the pump inlet.
❏
Caution should be exercised not to undersize the by-pass hose diameter and
length. Refer to Technical Bulletin 064 for additional information on the size and
length of the by-pass line.
❏
Check the pressure in the by-pass line to avoid over pressurizing the inlet.
❏
The by-pass line should be connected to the pump inlet line at a gentle angle of
45° or less and no closer than 10 times the pump inlet port diameter e.g. 1-1/2"
port size = 15" distance from pump inlet port.
