Dover PSG Blackmer TXD1200 Series Manual

BLACKMER TRUCK PUMPS 961680
INSTRUCTIONS NO. 201-D00
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
MODELS: TXD1220A, 1225A, 1230A
Section
Effective
Replaces
201
Jan 2014
Aug 2010
Numbers in parentheses following individual parts
indicate reference numbers on Blackmer Parts Lists
201-D02, 201-D03 and 201-D04.
Blackmer pump manuals and parts lists may be
obtained from Blackmer’s website (www.blackmer.com)
or by contacting Blackmer Customer Service.
TABLE OF CONTENTS Page
PUMP DATA
Technical Data.......................................................2
Initial Pump Start Up Information...........................2
INSTALLATION
Pre-Installation Cleaning........................................3
Location and Piping...............................................3
Truck Mounting......................................................3
Pump Drive............................................................3
Pump Rotation.......................................................4
To Change Pump Rotation....................................4
OPERATION
Pre-Start Up Check List.........................................5
Start Up Procedures..............................................5
Pump Speed..........................................................5
Reverse Rotation...................................................5
Flushing the Pump.................................................6
Pump Relief Valve .................................................6
Relief Valve Setting and Adjustment......................6
MAINTENANCE
Strainers ................................................................7
Lubrication.............................................................7
Vane Replacement................................................8
Pump Disassembly................................................8
Pump Assembly.....................................................9
TROUBLE SHOOTING......................................10
SAFETY DATA
This is a SAFETY ALERT SYMBOL.
When you see this symbol on the product, or in the
manual, look for one of the following signal words and be
alert to the potential for personal injury, death or major
property damage
Warns of hazards that WILL cause serious personal injury,
death or major property damage.
Warns of hazards that CAN cause serious personal injury,
death or major property damage.
Warns of hazards that CAN cause personal injury
or property damage.
NOTICE:
Indicates special instructions which are very
important and must be followed.
NOTICE:
Blackmer Truck Pumps MUST only be installed in systems,
which have been designed by qualified engineering
personnel. The system MUST conform to all applicable
local and national regulations and safety standards.
This manual is intended to assist in the installation and
operation of the Blackmer truck pumps, and MUST be kept
with the pump.
Pump service shall be performed by qualified technicians
ONLY. Service shall conform to all applicable local and
national regulations and safety standards.
Thoroughly review this manual, all instructions and hazard
warnings, BEFORE performing any work on the pump.
Maintain ALL system and pump operation and hazard
warning decals.

201-D00 page 2/12
SAFETY DATA
Failure to set the vehicle emergency
brake and chock wheels before
performing service can cause severe
personal injury or property damage.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Hazardous pressure
can cause personal
injury or property
damage
Hazardous pressure
can cause personal
injury or property
damage
Failure to relieve system pressure prior
to performing pump service or
maintenance can cause personal injury
or property damage.
If pumping hazardous or toxic fluids,
system must be flushed prior to
performing service
Hazardous pressure
can cause personal
injury or property
damage
Hazardous or toxic
fluids can cause
serious injury.
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
severe personal injury or death
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Hazardous
machinery can
cause serious
personal injury. Do not operate
without guard
in place
PUMP DATA
PUMP IDENTIFICATION
A pump Identification tag, containing the pump serial number, I.D. number, and model designation, is attached to each pump. It is
recommended that the data from this tag be recorded and filed for future reference. If replacement parts are needed, or if
information pertaining to the pump is required, this data must be furnished to a Blackmer representative.
TECHNICAL DATA
TXD1200 Models
Maximum Operating
Temperature * 240 – 300°F (115 – 149°C)
Maximum Speed
size 2, 2.5
size 3
1200 RPM
900 RPM
Maximum Viscosity 100 SSU (22 Cst)
Maximum Differential
Pressure 125 psi (8.6 Bar)
Maximum Working
Pressure 175 psi (12.1 Bar)
* Maximum operating limits are dependent on the materials of
construction. See Blackmer Material Specs 201-093.
INITIAL PUMP START UP INFORMATION
Model No.: ___________________________________
Serial No.: ___________________________________
Date of Installation: ___________________________
Pressure Gauge Reading: ______________________
Vacuum Gauge Reading: _______________________
Flow Rate: ___________________________________

201-D00 page 3/12
INSTALLATION
NOTICE:
Blackmer truck pumps must only be installed in systems
designed by qualified engineering personnel. System
design must conform with all applicable regulations and
codes and provide warning of all system hazards.
PRE-INSTALLATION CLEANING
NOTICE:
New pumps contain residual test fluid and rust inhibitor.
If necessary, flush pump prior to use.
Foreign matter entering the pump WILL cause extensive
damage. The supply tank and piping MUST be cleaned and
flushed prior to pump installation and operation.
LOCATION AND PIPING
An improperly designed piping system or unit installation
WILL significantly reduce pump performance and life. The
following are piping system guidelines for pump installation.
1. To minimize intake losses, locate the pump as close as
possible to the source of supply.
2. Piping MUST be properly supported to prevent any piping
loads from being placed on the pump.
3. Intake piping and fittings MUST be at least as large in
diameter as the pump intake connection.
4. Minimize the number of intake line fittings (valves, elbows,
etc.) and piping turns or bends.
5. Install vacuum and pressure gauges in the ¼" NPT ports
located on the pump cylinder near the intake and
discharge flanges to check pump at start-up
6. Install a strainer in the inlet line to protect the pump from
foreign matter. Place the intake strainer to allow frequent
cleaning.
7. Intake and discharge piping MUST be free of all leaks.
TRUCK MOUNTING
The pump will operate satisfactorily in any position. Consult
Blackmer factory for vertical shaft mounts. The pump can be
bolted to the truck frame or on a saddle hung below the
frame, and MUST be adequately supported. Mounting the
pump with the cylinder feet down, or with the intake port up, is
recommended for thorough draining of the pump.
PUMP DRIVE
The pump may be driven by a power take-off through
universal joints. When using universal joints, a splined slip
joint, properly lubricated, must be used on the connecting
jackshaft to prevent end thrust on the pump shaft.
It is very important to install a proper drive line to avoid
excessive wear, vibration and noise see Fig. 2 and Table 1.
A drive shaft guard between the PTO
and pump must be provided to prevent
personal injury, property damage, or
death.
Do not operate
without guard
in place
Note: A Drive Shaft Guard Between the Pump and
PTO Must Be Provided (Not Shown)
Figure 2 Pump Drive
Angle of Drive Shaft
1º through 5º 6º through 10º 11º through 15º
Very Good Good Fair
Table 1
General guidelines to follow for proper pump drive:
1. DO NOT use Square slip joints.
2. Use the least number of jackshafts as is practical.
3. Use an even number of universal joints and a balanced
drive shaft for the high speed pumps.
4. The pump shaft and power take-off shaft must be parallel
in all respects. Use an angular level measuring device to
ensure the PTO and pump shaft are parallel to each
other. If necessary, the pump can be shimmed to correct
any misalignment. The PTO shaft coming off at the
transmission does not need to be perfectly horizontal as
long as the pump is shimmed to have its shaft parallel in
all respects to the PTO shaft.
5. The yokes of the universals at both ends of the jackshaft
must be parallel and in phase.
6. The maximum angle between the jackshaft and the pump
shaft is 15 degrees. Refer to Table 1.
Failure to follow any of these guidelines may result in a gallop
or uneven turning of the pump rotor, which will in turn cause a
surging vibration to the liquid stream and piping system.
Contact the supplier of the drive line components for specific
design assistance.

201-D00 page 4/12
INSTALLATION
Hydraulic Drive
The pump may also be driven hydraulically. Hydraulic motors
need to be well supported with their shafts parallel to the
pump shaft in all respects. Blackmer provides an optional
close-coupled hydraulic motor adapter. The adapter provides
for straight alignment of a hydraulic motor drive through a
solid coupling connected to a straight key shaft. This coupling
connection requires grease lubrication every three months at
minimum. Refer to the "Lubrication" section of this manual.
Figure 3 Hydraulic Drive
PUMP ROTATIONNOTICE:
Confirm correct pump rotation by checking the pump
rotation arrows respective to pump driver rotation.
TO CHANGE PUMP ROTATION
The TXD1200 series pump models are equipped with a
double ended rotor and shaft, enabling them to be driven from
either shaft end. To change rotation, rotate the pump 180
degrees so that the opposite shaft becomes the driven shaft.
The shaft protector (186) MUST be mounted over the non-
driven shaft end.
Operation without shaft protector can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard
in place

201-D00 page 5/12
OPERATION
Pumps operating against a closed
valve can cause system failure,
personal injury and property damage
Hazardous pressure
can cause personal
injury or property
damage
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Hazardous pressure
can cause personal
injury or property
damage
If pumping hazardous or toxic fluids,
system must be flushed prior to
performing service
Hazardous or toxic
fluids can cause
serious injury.
Failure to relieve system pressure prior
to performing pump service or
maintenance can cause personal injury
or property damage.
Hazardous pressure
can cause personal
injury or property
damage
PRE-START UP CHECK LIST
1. Check the alignment of the pipes to the pump. Pipes must
be supported so that they do not spring away or drop
down when the pump flanges or union joints are
disconnected.
2. Install vacuum and pressure gauges in the ¼" NPT ports
located on the pump cylinder near the intake and
discharge flanges. These can be used to check the actual
suction and discharge conditions after pump start-up.
3. Inspect complete piping system to ensure that no piping
loads are being placed on the pump.
4. Secure appropriate hose connections.
START UP PROCEDURES
NOTICE:
Consult the "General Pump Troubleshooting" section of
this manual if difficulties during start up are experienced.
1. Ensure that appropriate valves are open in the inlet and
discharge lines.
2. Start the pump. Priming should occur within one minute.
3. Check the vacuum and pressure gauges to ensure the
system is operating within expected parameters. Record
the gauge readings in the "Initial Start Up Information"
section of this manual for future reference.
4. Inspect piping, fittings, and associated system equipment
for leaks, noise, vibration and overheating.
5. Check the flow rate to ensure the pump is operating within
the expected parameters.
6. Check the pressure setting of the relief valve by
momentarily closing a valve in the discharge line and
reading the pressure gauge. This pressure needs to be 15
-20 psi (1.0 - 1.4 Bar) higher than the maximum system
operating pressure or the external bypass valve setting (if
equipped). DO NOT operate the pump against a closed
discharge valve for more than 15 seconds. If
adjustments need to be made, refer to the "Relief Valve
Setting and Adjustment" section of this manual.
PUMP SPEED
PTO and hydraulically driven units MUST contain speed
control devices to prevent pump speeds above the maximum
RPM specifications, regardless of the truck engine unloading
speeds. If fluid delivery is less than expected, see the
"General Pump Troubleshooting" section
REVERSE ROTATION
NOTICE:
When pumps are operated in reverse a separate pressure
relief valve must be installed to protect the pump from
excessive pressure.
It may be desirable to run the pump in reverse rotation for
system maintenance. The pump will operate satisfactorily in
reverse rotation for a LIMITED time, at a reduced
performance level. When operating the pump in reverse, a
separate bypass valve MUST be installed to protect the pump
from excessive pressure.

201-D00 page 6/12
OPERATION
FLUSHING THE PUMP
NOTICE:
If flushing fluid is to be left in the pump for an extended
time, it must be a lubricating, non-corrosive fluid. If a
corrosive, non-lubricating fluid is used, it must be
flushed from the pump immediately.
To flush the pump, use the following procedure:
1. Allow the pump to evacuate as much fluid as possible.
2. Run cleaning fluid through the pump intake. The
cleaning fluid should be compatible with the pump O-rings
and vane material. When handling "sticky" fluids that
solidify within the pump (i.e., waxes, adhesives, resins,
asphalts, etc.), use a fluid that will prevent solidification of
the fluid being transferred and facilitate flushing.
3. Operate the pump against a closed discharge for 15
seconds to allow the cleaning fluid to recirculate through
the internal relief valve.
NOTICE:
After flushing the pump some residual fluid will remain in
the pump and piping. NOTICE:
Properly dispose of all waste fluids in accordance with
the appropriate codes and regulations.
RELIEF VALVE NOTICE:
The pump internal relief valve is designed to protect the
pump from excessive pressure and must not be used as
a system pressure control valve.
Pumping volatile liquids under suction lift may cause
cavitation. DO NOT partially close the discharge valve. This
WILL result in internal relief valve chatter. For these
applications, install an external bypass valve, and any
necessary piping, back to the storage tank. Use a bypass
system when operating for extended periods (more than 1
minute) against a closed discharge valve.
Failure to disengage PTO before
adjusting pump relief valve can cause
severe personal injury or death
Hazardous Machinery
can cause severe
personal injury or death
Incorrect settings of the pressure
relief valve can cause pump
component failure, personal injury,
and property damage.
Hazardous pressure can
cause personal injury or
property damage
RELIEF VALVE SETTING AND ADJUSTMENT
Relief valve cap is exposed to pumpage
and will contain some fluid
Hazardous or toxic
fluids can cause
serious injury.
The relief valve pressure setting is marked on a metal tag
attached to the valve cover. Generally, the relief valve should
be set at least 15 - 20 psi (1.0 - 1.4 Bar) higher than the
operating pressure, or the external bypass valve setting (if
equipped).
DO NOT remove the R /V Cap OR adjust the relief valve
pressure setting while the pump is in operation.
1. To INCREASE the pressure setting, remove the relief
valve cap, loosen the locknut, and turn the adjusting
screw inward, or clockwise. Retighten the locknut and
replace the valve cap.
2. To DECREASE the pressure setting, remove the relief
valve cap, loosen the locknut, and turn the adjusting
screw outward, or counterclockwise. Retighten the locknut
and replace the valve cap.
Refer to the individual Blackmer pump parts lists for spring
pressure ranges. The pumps are supplied from the factory
with the relief valve adjusted to the mid-point of the spring
range, unless specified differently. If the pump is equipped
with a Blackmer air valve, refer to setting and adjustment
procedures in Blackmer Air Valve Instructions and Parts List
No. 201-G00.
NOTICE:
Where regulations require, holes in R/V cap (1) and
capscrew with hole (5C) are used by the weights and
measures official(s) to apply a security seal or tag.

201-D00 page 7/12
MAINTENANCE
Failure to set the vehicle emergency
brake and chock wheels before
performing service can cause severe
personal injury or property damage.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Hazardous pressure
can cause personal
injury or property
damage
Hazardous pressure
can cause personal
injury or property
damage
Failure to relieve system pressure prior
to performing pump service or
maintenance can cause personal injury
or property damage.
If pumping hazardous or toxic fluids,
system must be flushed prior to
performing service
Hazardous pressure
can cause personal
injury or property
damage
Hazardous or toxic
fluids can cause
serious injury.
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
severe personal injury or death
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Hazardous
machinery can
cause serious
personal injury. Do not operate
without guard
in place
NOTICE:
Maintenance shall be performed by qualified technicians only,
following the appropriate procedures and warnings as presented in this manual.
STRAINERS
Strainers must be cleaned regularly to avoid pump starvation.
Schedule will depend upon the application and conditions.
LUBRICATION NOTICE:
To avoid possible entanglement in moving parts do not
lubricate pump bearings, hydraulic adapter coupling or
any other parts while the pump is running.
NOTICE:
If pumps are repainted in the field, ensure that the grease
relief fittings (76A) are functioning properly after
painting. Do NOT paint them closed. Remove any
excess paint from the fittings.
Lubricate the ball bearings, and hydraulic motor couplings (if
equipped), every three months at a minimum.
Recommended Grease:
Mobil® - Mobilgrease XHP222,
Exxon® - RONNEX MP Grease,
or equivalent.
Greasing Procedure:
1. Remove the grease relief fittings (76A) from the bearing
covers (27A) or hydraulic motor adapter (135).
2. Apply grease with a hand gun until grease begins to
escape from the grease relief fitting port.
3. Replace the grease relief fittings (76A).
DO NOT overgrease pump bearings. While it is normal for
some grease to escape from the grease tell-tale hole after
lubrication, excessive grease on pumps equipped with
mechanical seals can cause seal failure.

201-D00 page 8/12
MAINTENANCE
VANE REPLACEMENT
NOTICE:
Maintenance shall be performed by qualified technicians
only, following the appropriate procedures and warnings
as presented in manual.
1. Remove the head assembly from the outboard (non-
driven) side of the pump according to steps 2 - 6 in the
"Pump Disassembly" section of this manual.
2. Turn the shaft by hand until a vane comes to the top (12
o'clock) position of the rotor. Remove the vane.
3. Install a new vane, ensuring that the rounded edge is UP,
and the relief grooves are facing towards the direction of
rotation. See Figure 4.
4. Repeat steps 2 and 3 until all vanes have been replaced.
5. Reassemble the pump according to steps 2 - 7 and 12 -
17 of the "Pump Assembly." section of this manual.
Figure 4
2-inch models have four (4) vanes.
PUMP DISASSEMBLY
NOTICE:
Follow all hazard warnings and instructions provided in
the “Maintenance” section of this manual.
1. Starting on the inboard (driven) end of the pump, clean
the pump shaft thoroughly, making sure the shaft is free of
nicks and burrs. This will prevent damage to the
mechanical seal when the inboard head assembly is
removed.
2. Remove the inboard bearing cover capscrews (28) and
slide the inboard bearing cover (27A) and gasket (26) off
the shaft. Discard the bearing cover gasket. On the 1.5,
2, and 2.5 inch pump models, the dirt shield (123A) will
come off with the bearing cover.
3. Remove the outboard bearing cover capscrews (28) and
slide the outboard bearing cover (27A) and gasket (26) off
the shaft. Discard the bearing cover gasket.
4. Remove locknuts and lockwashers (24A, 24B):
a. Bend up the engaged lockwasher tang and remove
setscrew (24C). Rotate the locknut counterclockwise
to remove it from the shaft.
b. Slide the lockwasher off the shaft. Inspect the
lockwasher for damage and replace as required.
c. Repeat steps a and b on the opposite shaft end.
5. Remove the head capscrews (21) and carefully pry the
head (20) away from the cylinder.
6. Slide the head off the shaft. The head O-ring (72), bearing
(24), and mechanical seal (153) will come off with the
head assembly. Remove and discard the head O-ring.
a. Pull the bearing (24) from the housing in the head.
b. To remove the mechanical seal (153), use two screw
drivers to gently push the backside of the seal jacket
to push the seal from the head (see Figure 5). Use
care when placing the screwdrivers to prevent damage
to the seal faces. Remove and discard mechanical
seal O-rings.
Figure 5
7. Pull the rotor and shaft (13) from the cylinder (12). While
one hand is pulling the shaft, the other hand should be
cupped underneath the rotor to prevent the vanes (14)
from falling out. Carefully set the rotor and shaft, vanes
aside for future vane replacement and reassembly.
8. Remove the remaining components from the outboard
side of the pump, as instructed in steps 6 and 7 above.

201-D00 page 9/12
MAINTENANCE
PUMP ASSEMBLY
Before reassembling the pump, inspect all component
parts for wear or damage, and replace as required. Wash
out the bearing/seal recess of the head and remove any
burrs or nicks from the rotor and shaft.
1. Reassemble the OUTBOARD side of the pump first:
a. For a CLOCKWISE rotation pump, position the pump
cylinder with the INTAKE port to the left.
b. For a COUNTERCLOCKWISE rotation pump, position
the pump cylinder with the INTAKE port to the right.
2. Install a new head O-ring (72) in the groove in the head.
Lightly grease the outside circumference of the O-ring to
facilitate head installation. Start in on one side of the
groove, stretching ahead with the fingers. See Figure 6.
Figure 6
3. Install the head (20) on the outboard side of the cylinder.
Install and uniformly tighten four head capscrews (21) 90°
apart, torquing to 25 lbs. ft (34 Nm).
4. MECHANICAL SEAL
Apply a small amount of motor oil in the head recess.
Push the mechanical seal assembly (153) into the recess
of the head with seal jacket drive tangs inward. The pin in
the stationary seat must be between the lugs in the back
of the head recess.
5. Hand pack the ball bearing (24) with grease. Refer to the
"Lubrication" section for the recommended grease.
6. Install the bearing into the head recess. The bearing balls
should face outward, with the grease shield inward.
Ensure the bearing is fully and squarely seated against
the mechanical seal.
7. Turn the pump cylinder around and begin assembly on the
opposite, inboard end.
8. Inspect the vanes (14) for wear and damage, and replace
as follows:
a. Install the non-driven end of the rotor and shaft (13)
into the open side of the pump cylinder.
b. Insert the new vanes into the rotor slots with the
rounded edges outward, and the vane relief grooves
facing TOWARDS the direction of rotation. See Figure
4.
c. Rotate the shaft by hand to engage the drive tangs
of the seal jacket in the rotor slots.
9. Install the inboard head (20), mechanical seal, and
bearing as instructed in steps 2 through 7. Apply a thin
coating of motor oil on the inboard shaft to aid installation.
10. Rotate the shaft by hand to engage the mechanical seal
drive tangs, and to test for binding or tight spots. If the
rotor does not turn freely, lightly tap the rims of the heads
with a soft faced mallet until the correct position is found.
Install all of the remaining head capscrews for each head
and uniformly torque to 25 lbs. ft (34 Nm).
11. LOCKNUT INSTALLATION
The bearing locknuts (24A) and lockwashers (24B) MUST
be installed and adjusted properly. Overtightening
locknuts can cause bearing failure or a broken lockwasher
tang. Loose locknuts will allow the rotor to shift against
the heads, causing wear. See Figure 7.
Figure 7 Locknut Adjustment
a. On both ends of the pump shaft, Install a lockwasher
(24B) with the tangs facing outward, followed by a
locknut (24A) with the tapered end inward. Ensure the
inner tang "A" of the lockwasher is located in the slot
in the shaft threads, bending it slightly, if necessary.
b. Tighten both locknuts (24A) to ensure that the
bearings (24) are bottomed in the head recess. DO
NOT overtighten and bend or shear the lockwasher
inner tang.
c. Loosen both locknuts one complete turn.
d. Tighten one locknut until a slight rotor drag is felt when
turning the shaft by hand.
e. Back off the nut the width of one lockwasher tang "B".
Secure the nut by bending the closest aligned
lockwasher tang into the slot in the locknut. The pump
should turn freely when rotated by hand.
f. Tighten the opposite locknut by hand until it is snug
against the bearing. Then, using a spanner wrench,
tighten the nut the width of one lockwasher tang.
Tighten just past the desired tang, then back off the
nut to align the tang with the locknut slot. Secure the
nut by bending the aligned lockwasher tang into the
slot in the locknut. Tighten locknut setscrews (24C) on
both ends of shaft. The pump should continue to turn
freely when rotated by hand.
g. To check adjustment, grasp the nut and washer with
fingers and rotate back and forth. If this cannot be
done, one or both locknuts are too tight and should be
alternately loosened one stop at a time (.001") (25
microns). Begin by loosening the locknut adjusted last.

201-D00 page 10/12
MAINTENANCE
12. Inspect the grease seal (104) for wear or damage and
replace as required. Grease the outside diameter of the
grease seal and push it into the bearing cover (27 or 27A)
with the lip of the seal inward. The lip will face outward
when the bearing cover is installed on the head
13. Attach a new bearing cover gasket (26) and the bearing
cover to the head. Install and torque the bearing cover
capscrews (28) to 15 lbs. ft (20 Nm).
14. Follow steps 14 and 15 to install the grease seal and
bearing cover (27 or 27A) on the opposite side of the
pump.
15. On 2 and 2.5-inch pump models, push the dirt shield
(123A) over the inboard shaft and firmly against the
bearing cover (27).
16. Attach the shaft protector (186) on the non-driven shaft
end.
Operation without shaft protector can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard in
place.
18. RELIEF VALVE ASSEMBLY
If the pump is equipped with a Blackmer air valve, refer to
setting and adjustment procedures in Blackmer Air Valve
Instructions and Parts List No. 201-G00.
a. Insert the valve (9) into the relief valve bore of the
cylinder with the fluted end inward.
b. Install the relief valve spring (8) and spring guide (7)
against the valve.
c. Attach a new relief valve gasket (10) and the valve
cover (4) on the cylinder.
d. Screw the relief valve adjusting screw (2) into the
valve cover until it makes contact with the spring guide
(7). NOTICE:
The relief valve setting MUST be tested and adjusted
more precisely before putting the pump into service.
Refer to "Relief Valve Setting and Adjustment"
e. Install the relief valve cap (1) and gasket (88) after the
relief valve has been precisely adjusted.
TROUBLESHOOTING
NOTICE:
Maintenance shall be performed by qualified technicians only, following the
appropriate procedures and warnings as presented in this manual.
SYMPTOM PROBABLE CAUSE
Pump Not Priming
1. Pump not wetted.
2. Worn vanes.
3. Suction valve closed.
4. Air leaks in the suction line.
5. Strainer clogged.
6. Suction line or valves clogged or too restrictive.
7. Broken drive train.
8. Pump vapor-locked.
9. Pump speed too low for priming.
10. Relief valve partially open, worn or not seating properly.
11. Vanes installed incorrectly (see "Vane Replacement").