BLACKMER ATX300A Manual

BLACKMER TRUCK PUMPS 967300
INSTRUCTIONS NO. 201A-A00_07jul
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
MODELS: ATX300A, ATX300A-HYD
Section
Effective
Replaces
201A
July 2007
April 2005
ATX MODELS
ATX-HYD MODELS
NOTE: Numbers in parentheses following individual
parts indicate reference numbers on Blackmer Parts List
No. 201A-A01.
NOTE: Blackmer pump manuals & 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.......................................................3
To Change Pump Rotation....................................3
OPERATION
Pre-Start Up Check List.........................................4
Start Up Procedures..............................................4
Pump Speed..........................................................4
Reverse Pump Rotation.........................................4
Flushing the Pump.................................................4
Direct Acting Relief Valve ......................................5
Relief Valve Setting and Adjustment......................5
Optional Pneumatic Relief Valve ...........................5
MAINTENANCE
Strainers ................................................................6
Lubrication.............................................................6
Vane Replacement................................................6
Pump Disassembly................................................7
Pump Assembly.....................................................7
TROUBLE SHOOTING....................................... 9
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 ATX 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 ATX truck pumps, and MUST
be kept with the pump.
Blackmer ATX truck 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
Blackmer truck pumps.
Maintain ALL system and Blackmer ATX truck pump
operation and hazard warning decals.
Dec 2008: Discontinued Models, parts availability may be limited.

201A-A00 Page 2/12
SAFETY DATA
Hazardous machinery
can cause serious
personal injury or
property damage.
Failure to set the vehicle emergency
brake and chock wheels before
performing service can cause severe
personal injury or property damage.
Hazardous
machinery can
cause serious
personal injury.
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
serious personal injury or death
Hazardous or toxic
fluids can cause
serious injury.
If pumping hazardous fluids, system
must be flushed, prior to performing
service or maintenance
Hazardous pressure
can cause serious
personal injury or
property damage.
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.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Do not operate
without guard
in place
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
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
ATX PUMP MODELS
Maximum Pump Speed 1000 RPM
Maximum Operating Temperature 240°F (115°C)
Maximum Viscosity 300 SSU (63 cSt.)
Maximum Differential Pressure 125 psi (8.6 Bar)
Maximum Working Pressure 175 psi (12.1 Bar)
Technical Data is for standard materials of construction.
Consult Blackmer Material Specs for optional materials of
construction.
INITIAL PUMP START UP INFORMATION
Model No.: ___________________________________
Serial No.: ___________________________________
ID No.: ______________________________________
Date of Installation: ___________________________
Pressure Gauge Reading: ______________________
Vacuum Gauge Reading: _______________________

201A-A00 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.
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. 1 and Table 1.
Do not operate
without guard
in place.
A drive shaft guard between the PTO
and pump must be provided to prevent
personal injury, property damage, or
death.
Note: A Drive Shaft Guard between the pump and the
PTO MUST be provided. (Not Shown)
Figure 1 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.
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 shafts 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.
HYDRAULIC DRIVE
The ATX300A-HYD models are driven hydraulically.
Hydraulic motors should be well supported with their shafts
parallel to the pump shaft in all respects. ATX-HYD models
are equipped with a close-coupled hydraulic motor adapter
that provides for straight alignment of a hydraulic motor drive
through a solid coupling connected to a splined pump shaft.
This coupling connection requires grease lubrication every
three months at minimum. Refer to the "Lubrication" section
of this manual.
PUMP ROTATION NOTICE:
Confirm correct pump rotation by checking the pump
rotation arrows respective to pump driver rotation.
TO CHANGE PUMP ROTATION
To reverse rotation, the pump must be disassembled then
reassembled with the shaft on the opposite side of the pump.
See the ‘Maintenance’ section for instructions.

201A-A00 Page 4/12
OPERATION
Hazardous pressure
can cause serious
personal injury or
property damage.
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 or toxic
fluids can cause
serious injury.
If pumping hazardous or toxic fluids,
system must be flushed prior to
performing service
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.
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 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. If equipped with a direct acting relief valve, 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 PUMP 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.
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.

201A-A00 Page 5/12
OPERATION
DIRECT ACTING RELIEF VALVE
NOTICE:
The direct acting 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.
RELIEF VALVE SETTING AND ADJUSTMENT
Hazardous machinery
can cause serious
personal injury or
death.
Failure to disengage PTO before
adjusting pump relief valve can cause
severe personal injury or death.
Hazardous pressure
can cause serious
personal injury or
property damage.
Incorrect settings of the pressure relief
valve can cause pump component
failure, personal injury, and property
damage.
Hazardous or toxic
fluids can cause
serious injury.
Relief valve cap is exposed to pumpage
and will contain some fluid
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. 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. Replace the valve cap.
Refer to the individual Blackmer pump parts lists for various
spring pressure ranges. Unless specified otherwise, pumps
are supplied from the factory with the relief valve adjusted to
the mid-point of the spring range.
OPTIONAL PNEUMATIC RELIEF VALVE
The optional pneumatic actuated relief valve is designed to
operate at two different relief pressures. The High Pressure
mode provides pressure for product delivery. The Low
Pressure mode allows the pump to bypass fluid at lower
pressure during no flow conditions. Flow sense products are
available from other manufacturers. When air pressure is
applied, the pneumatic valve achieves the maximum pressure
setting to allow the full liquid flow through the system.
The pneumatic relief valve can be supplied with either a low
pressure or a high pressure spring:
The low pressure spring (8A) will bypass at 75 psi (5.2
bar) in actuated mode, and 40 psi (2.8 bar) full flow in
non-actuated mode. The low pressure spring requires
60 psi (4.1 bar) minimum air pressure to activate.
The high pressure spring (8B) will bypass at 115 psi
(7.9 bar) in actuated mode, and 55 psi (3.8 bar) full flow
in non-actuated mode. The high pressure spring
requires a minimum of 95 psi (6.6 bar) air pressure to
activate.
The pneumatic relief valve is controlled by a three-way valve
piped to vent the pneumatic valve to atmosphere when in the
OFF position. The breather (10B) in the cover is designed to
function as a “tell-tale” to indicate any seal problems with the
actuating piston. NOTICE:
If any fluid or air flow appears at the breather (10B), the
seals (9D or 9F) are leaking and MUST be REPLACED
immediately.
When replacing the pneumatic relief valve seals (9D and 9F),
it is important that they be positioned properly, as shown in
Figure 2.
Figure 2 – Optional Pneumatic Relief Valve

201A-A00 Page 6/12
MAINTENANCE
Hazardous machinery
can cause serious
personal injury or
property damage.
Failure to set the vehicle emergency
brake and chock wheels before
performing service can cause severe
personal injury or property damage.
Hazardous
machinery can
cause serious
personal injury.
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
serious personal injury or death
Hazardous or toxic
fluids can cause
serious injury.
If pumping hazardous fluids, system
must be flushed, prior to performing
service or maintenance
Hazardous pressure
can cause serious
personal injury or
property damage.
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.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury, death or major property damage
Do not operate
without guard
in place
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
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.
Lubricate the ball bearings, and hydraulic motor couplings (if
equipped), every three months at a minimum
Recommended Grease:
Exxon® - RONNEX MP Grease,
Mobile® - MOBILITH AW-2 (64353-6) 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. (76)
3. Replace the grease relief fittings (76A).
DO NOT over grease 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.
VANE REPLACEMENT
NOTICE:
Follow all hazard warnings and instructions provided in
the “maintenance” section of this 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 3.
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 3 – Vane Installation

201A-A00 Page 7/12
MAINTENANCE
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. On ATX300A model, remove the bearing cover
capscrews (28) and slide the inboard bearing cover (27A)
and gasket (26) off the shaft.
3. On ATX300A-HYD model, remove the adapter
capscrews (135B) and remove the hydraulic motor
adapter (135), gasket (26) and coupling (34).
4. To remove the locknut and lockwasher (24A and 24B):
a. Bend up the engaged lockwasher tang, loosen the
setscrew (24C), and rotate the locknut
counterclockwise to remove it from the shaft
b. Slide the lockwasher off the shaft.
5. Remove the head capscrews (21) and carefully pry the
head (20) away from the casing. (Jackscrew holes are
provided for this purpose)
6. Slide the head off the shaft. The head O-ring (72),
bearing (24), mechanical seal (153), and disc (71) 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. Remove the disc (71) from the head.
c. To remove the mechanical seal (153), use the flat
end of a screwdriver to gently push the backside of
the stationary seat from the head. Place a cloth
under the seal to avoid damage. (see figure 4)
Disc Removal Seal Removal
Figure 4
7. Remove the bearing cover, locknut and lockwasher from
the outboard pump end.
8. Pull the rotor and shaft (13) from the casing. While one
hand is pulling the shaft, the other hand should be
cupped underneath the rotor to prevent the vanes (14)
and push rods (77) from falling out. Carefully set the
rotor and shaft aside for future vane replacement and
reassembly.
9. Remove the remaining components from the outboard
side of the pump, as instructed in steps 5 and 6 above.
10. Remove the casing liner (41) by uniformly tapping around
the outside diameter of the liner with a hard wood drift
and a hammer until the liner is driven from the casing.
PUMP ASSEMBLY NOTICE:
Follow all hazard warnings and instructions provided in
the “Maintenance” section of this manual.
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. Determine the mounting position of the pump when
affixed to the mounting bracket (32).
a. Determine the OUTBOARD (non-driven) side of the
pump, and begin assembly on this side first.
b. Check to ensure the drive shaft rotation and the
vane orientation correspond to the same direction as
the arrows cast into the pump casing. (refer to Vane
Replacement)
2. Start the liner (41) into the pump casing with the liner key
(74) aligned with the notch in the casing and with the cast
word “INTAKE” on the liner towards the intake port.
Using a rubber mallet, uniformly tap around the edge of
the liner to fully install it into the casing.
3. Install the disc (71) with the relief groove face next to the
rotor aligning to the pin in the head of the pump. (see
Figure 4)
4. Install a new head O-ring (72) in the groove on the inside
face of the head.
5. Install the head (20) & disc (71) on the outboard side of
the casing, using the casing pin for positioning. Install
and uniformly tighten four head capscrews (21) 90° apart,
torquing to 20 lbs ft (27 Nm).
6. Apply a small amount of motor oil in the head recess.
Push the mechanical seal assembly (153) into the recess
of the head with the seal jacket drive tangs inward. The
pin in the stationary seat should be to either side of the
lug in the back of the head recess.
7. Hand pack the ball bearing (24) with grease. Refer to the
"Lubrication" section for the recommended grease.
8. Install the bearing into the head recess. The bearing balls
should face outward, with the grease shield inward.
Ensure that the bearing is fully and squarely seated
against the mechanical seal. Gently tap the inner race of
the bearing with a rubber mallet, if necessary.
9. Turn the pump casing around and begin assembly on the
opposite, inboard end.
10. Remove the vanes (14) and push rods (77) from the rotor
and shaft assembly. Inspect for wear and damage, and
replace as follows:
a. Partially install the non-driven end of the rotor and
shaft (13) into the open side of the pump casing.
b. Leave part of the rotor outside of the casing so that
the bottom vanes can be installed and held in place
as the push rods are installed in the push rod holes
of the rotor. Insert the new vanes into the rotor slots
with the rounded edges outward, and the vane relief
grooves facing TOWARDS the direction of rotation
(Figure 3).
c. After the bottom vanes and push rods are installed,
insert the rotor and shaft fully into the casing.

201A-A00 Page 8/12
MAINTENANCE
11. Install the remaining vanes into the top positions of the
rotor. Rotate the shaft by hand to engage the drive
tangs of the mechanical seal jacket in the rotor slots.
12. Install the inboard head, disc, mechanical seal and
bearing as instructed in steps 3 through 6. Apply a thin
coating of motor oil on the inboard shaft to aid
installation.
13. Rotate the shaft by hand to test for binding or tight
spots. If the rotor does not turn freely, reposition the
heads until the proper position is found. Install the
remaining head capscrews for each head and uniformly
tighten, torquing to 20 lbs ft (27 Nm).
LOCKWASHER ADJUSTMENT
14. It is important that the bearing locknuts (24A) and
lockwashers (24B) 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. 5.
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. Make sure the inner tang "A" of the
lockwasher is located in the slot in the shaft
threads. Bend it slightly, if necessary.
b. Tap the outer edge of the bearings on both ends.
Using a spanner wrench, tighten both locknuts to
ensure that the bearings are bottomed in the head
recess. Use care not to overtighten and 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 "B". Secure the nut by bending the closest
aligned lockwasher tang into the slot in the locknut.
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" (0.03mm). Begin by loosening the
locknut adjusted last.
h. After the locknut adjustment is complete, tighten
the locknut set screws (24C) securely.
Figure 5 Locknut Adjustment
15. On ATX300A model, grease the outside diameter of the
grease seal (104) and push it into the inboard bearing
cover (27A) with the lip of the seal inward. The lip will
face outward when the bearing cover is installed on the
head. Attach a bearing cover gasket (26) and the
bearing cover (27A) to the inboard head. Install and
tighten the bearing cover capscrews(28), torquing to 15
lbs ft (20Nm).
16. On ATX300A-HYD model, install the coupling (34) on
the drive pump shaft, and attach the gasket (26) and
the hydraulic motor adapter (135) to the inboard head.
Install and tighten the adapter capscrews(135B),
torquing to 15 lbs ft (20Nm).
17. Attach the bearing cover gasket (26) and the outboard
bearing cover (27) to the outboard head. Install and
tighten the bearing cover capscrews(28), torquing to 15
lbs ft (20Nm).

201A-A00 Page 9/12
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").
Reduced Capacity
1. Pump speed too low.
2. Suction valves not fully open.
3. Air leaks in the suction line.
4. Excessive restriction in the suction line (i.e.: undersized piping, too many
elbows & fittings, clogged strainer, etc.).
5. Damaged or worn parts.
6. Excessive restriction in discharge line causing partial flow through the
relief valve.
7. Relief Valve worn, set too low, or not seating properly.
8. Vanes installed incorrectly (see "Vane Replacement").
9. Insufficient air pressure to the pneumatic relief valve
Noise
1. Excessive vacuum on the pump due to:
a. Undersized or restricted fittings in the suction line.
b. Pump speed too fast for the viscosity or volatility of the liquid.
c. Pump too far from fluid source.
2. Running the pump for extended periods with a closed discharge line.
3. Pump not securely mounted.
4. Improper drive line (see "Pump Drive").
5. Bearings worn or damaged.
6. Vibration from improperly anchored piping.
7. Bent shaft, or drive coupling misaligned.
8. Excessively worn rotor.
9. Malfunctioning valve in the system.
10. Relief valve setting too low.
11. Damaged vanes (see following category).

201A-A00 Page 10/12
TROUBLESHOOTING ……cont.
Damaged Vanes
1. Foreign objects entering the pump.
2. Running the pump dry for extended periods of time.
3. Cavitation.
4. Viscosity too high for the vanes and /or the pump speed.
5. Incompatibility with the liquids pumped.
6. Excessive heat.
7. Worn or bent push rods, or worn push rod holes.
8. Settled or solidified material in the pump at start-up.
9. Hydraulic hammer - pressure spikes.
10. Vanes installed incorrectly (see "Vane Replacement").
Broken Shaft
1. Foreign objects entering the pump.
2. Viscosity too high for the pump speed.
3. Relief valve not opening.
4. Hydraulic hammer - pressure spikes.
5. Pump/driver misalignment.
6. Excessively worn vanes or vane slots.
7. Settled or solidified material in the pump at start-up.
Mechanical Seal Leakage
1. O-rings not compatible with the liquids pumped.
2. O-rings nicked, cut or twisted.
3. Shaft at seal area damaged, worn or dirty.
4. Ball bearings overgreased.
5. Excessive cavitation.
6. Lip seal not seated properly.
7. Corrosion on lip seal housing.
8. Mechanical seal faces cracked, scratched, pitted or dirty.

201A-A00 Page 11/12
NOTES

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