Page 1
Phone: 800-669-1303 or 801-561-0303
Fax: 801-255-2312
e-mail: [email protected]
MAXIM 50D PUMP
Operation / Maintenance
Manual
SERIAL NUMBER (located on top of product):
PATENTS: U.S. 09642426, U.S. 06106246, U.S. 05971402, U.S. 05370507 07/27/2012 – MM50D-F
Page 2
CONTENTS
1 INSTALLATION ............................................................................................................ 3
1.1 UNPACKING ...................................................................................................... 3
1.2 UTILITIES / HOOK-UP ....................................................................................... 3
1.3 REMOTE EXHAUST HOOK-UP ........................................................................ 5
2 OPTIONS ...................................................................................................................... 6
2.1 FLUID PORT CONNECTION OPTIONS ............................................................ 6
2.2 FLUID FITTINGS / SURGE SUPPRESSOR HOOK-UP .................................... 6
2.3 OPTIONAL LEAK SENSING .............................................................................. 7
2.3.a Installation.............................................................................................. 7
2.3.b Sensor Signal Specifications ................................................................. 7
3 START-UP .................................................................................................................... 8
3.1 PERFORMANCE CHARTS ................................................................................ 8
4 MAINTENANCE ......................................................................................................... 10
4.1 PREVENTIVE MAINTENANCE SCHEDULE ................................................... 10
4.1.a Preventive Maintenance Record ......................................................... 11
4.2 RECOMMENDED SPARE PARTS .................................................................. 13
4.3 TOOLS .............................................................................................................. 13
4.4 PARTS ILLUSTRATION ................................................................................... 14
4.5 PARTS LIST ..................................................................................................... 15
4.6 CLEAN-UP ........................................................................................................ 15
4.7 DISASSEMBLY ................................................................................................ 16
4.7.a Body Disassembly ............................................................................... 17
4.7.b Head Disassembly ............................................................................... 17
4.7.c Control Base Disassembly .................................................................. 17
4.7.d Cleaning............................................................................................... 18
4.8 ASSEMBLY ...................................................................................................... 18
4.8.a Control Base Assembly ....................................................................... 18
4.8.b Body Assembly .................................................................................... 19
4.8.c Final Assembly .................................................................................... 20
4.9 TESTING .......................................................................................................... 21
4.9.a Performance Test ................................................................................ 21
4.9.b Dry Pump ............................................................................................. 22
4.9.c Dry Suction .......................................................................................... 22
5 TROUBLESHOOTING ............................................................................................... 23
6 WARRANTY ............................................................................................................... 24
7 CONTACT INFORMATION ........................................................................................ 25
7.1 GENERAL CONTACT INFORMATION ............................................................ 25
7.2 TECHNICAL SUPPORT ................................................................................... 25
7.3 REGIONAL REPRESENTATIVES ................................................................... 25
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL CONTENTS
Page 3
Qty
Item
Description
1
M50D
Maxim 50D Pump
1
MM50D
Operation/Maintenance Manual
1 INSTALLATION
1.1 UNPACKING
After unpacking, the pump should be checked for any damage that may have
occurred during shipment. Damage should be reported to the carrier
immediately.
The following items should be included within the shipping container:
1.2 UTILITIES / HOOK-UP
It is recommended that the pump be positioned within 15 from level to maintain
self-priming ability and pumping efficiency. Allow sufficient room for tubing
connectors. The pump mounts on a quick-change base for easy installation.
The pump has an exhaust location on the backside of the base. The exhaust
location requires 1/2” (12mm) minimum clearance behind the control base. Care
should be taken to elevate the pump whenever possible to help prevent flooding
these ports when the pump is located in a wet bench plenum. For remote
exhaust connection see Section 0.
Air Inlet: 1/4” FNPT (3/8” Dia. [8mm] supply tube minimum).
Fluid Ports: Inlet/Outlet Fluid Fittings and Surge Suppressor require torqueing
during pump installation. See Section 2 for hook- up diagram and
torque values.
Air Supply: 20-80 psig (1.4 – 5.4 bar) clean dry air or nitrogen (See
Performance Charts, Section 3.1.)
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 3
Page 4
Figure 1-1
ATTENTION: The pump should be operated with clean, dry air or nitrogen.
Particulate, water and oils in the air supply can damage the pump.
NOTE:
1. It is recommended that a filter be placed on the discharge side of the pump.
2. Although extensive efforts are made to deliver pumps to our customers
completely dry, new pumps may contain residual moisture from their final DI
water test.
Recommended Maximum Operating Levels: See Figure 3-2: Pressure vs.
Fluid Temperature Chart
PAGE 4 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 5
1.3 REMOTE EXHAUST HOOK-UP
Remove existing Muffler Assembly from pump base.
Install Exhaust Plug in Exhaust Port.
Remove Pipe Plug (1/4” NPT) from the pump base. Install the appropriately
sized fitting and tubing (not provided) to remote exhaust.
NOTE: To maintain optimum pump performance use 3/8” tubing minimum at a
length of 10 ft. maximum.
Figure 1-2
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 5
Page 6
Available Options
A) PFA Weldable pipe…………...1/2”
B) Flare style tube adapter.….1/2”, 3/4" and 1”
C) PFA tube stub out…………3/4”
D) NPT adapter nut.………….3/4”
Surge Suppressor
Assembled Height: IN (CM)
SS85
17.12 (43.49)
SS95
13.97 (35.48
C)
D)
A)
B)
2 OPTIONS
2.1 FLUID PORT CONNECTION OPTIONS
NOTE: Use O-ring to seal stainless steel or other rigid plumbing.
Figure 2-1
2.2 FLUID FITTINGS / SURGE SUPPRESSOR HOOK-UP
PAGE 6 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Figure 2-2
Page 7
NOTE: See Surge Suppressor Operation Manual for detailed installation
instructions.
2.3 OPTIONAL LEAK SENSING
2.3.a Installation
Remove plug and seal from port. Probe is self-sealing.
Install probe assembly into leak sensor port.
Thread probe cap into port. (NOTE: Do not over tighten; damage to threads
will occur.)
Push protective tubing into probe cap.
Connect fiber optic cable to sensor (NOTE: Minimize bends in fiber optic
cable to 2” radius minimum to help ensure optimum signal strength.) Fiber
optic cable can be cut to desired length using the cable cutter provided.
2.3.b Sensor Signal Specifications
The sensor signal is normally closed. In the event of a leak, no light signal is
returned to the sensor.
NOTE: See your fiber optic sensor installation instructions for proper hook-up
and adjustment.
Figure 2-3
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 7
Page 8
Air Supply
Pressure
(PSIG)
Discharge
Fluid Pressure
(PSIG)
Air
Used
(SCFM)
20 0 4.3
20
10
3.2
30 0 6.6
30
15
5.1
40 0 9.3
40
20
6.8
50 0 12.0
50
30
8.2
60 0 15.3
60
40
9.7
3 START-UP
Pump air supply pressure must be regulated (< 80 psig).
Open the fluid suction (IN) line valve, if necessary.
Open the fluid discharge (OUT) line valve, if necessary.
Start with air regulator at low (> 20 psi) pressure setting. Increase pressure
to attain desired flow, up to the maximum rating (See Section 3.1).
Table 1: Consumption / Efficiency can be used to determine approximate air
consumption.
Refer to Troubleshooting, Section 5, if pump fails to start.
ATTENTION: Prolonged periods (>5 minutes) of dry running can damage critical
internal pump parts.
CAUTION: When handling potentially dangerous fluids under pressure,
the pump and its fittings should be placed in an enclosure.
3.1 PERFORMANCE CHARTS
Pumping capacity is a function of air supply pressure and volume, suction head,
suction line restrictions, discharge head, discharge line restriction, and fluid
specific gravity and viscosity.
Table 1: Consumption / Efficiency
NOTE: Specification to be used to size regulators and control valves.
PAGE 8 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 9
Figure 3-1: Pressure & Capacity Chart
NOTE: Test information is based on specific conditions and limited sampling.
Use for general reference only.
Figure 3-2: Pressure vs. Fluid Temperature Chart
Recommended Maximum Pump Operating Levels
NOTE:
1. This graph is not representative of all operating conditions - customer’s
specific application results may vary.
2. Be sure that fittings and tubing used are capable of these operating
conditions.
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 9
Page 10
4 MAINTENANCE
Trebor pump maintenance can be divided into two categories: air system
maintenance and fluid system maintenance. The purpose of air system
maintenance is to prevent air system failures such as stalling or erratic cycling.
The purpose of fluid system maintenance is to maintain suction and lift
capabilities.
Pump Rebuild Service
Trebor International provides a factory rebuild service for customers using Trebor
products. Trebor will rebuild any standard pump (exclusive of options). Please
contact Trebor International Sales Department for current rebuild pricing. The
fixed rebuild price includes a factory rebuild and parts equivalent to the standard
rebuild kit. Each factory rebuild comes with a new one-year warranty. Repairs
requiring more extensive part replacements will be quoted prior to proceeding
with the pump rebuild. If the pump has exceeded its useful life and cannot be
rebuilt, the customer may elect to purchase a new Trebor pump. If the customer
chooses not to rebuild or replace the pump, a $150.00 evaluation charge will be
required.
All returned pumps are to be shipped freight prepaid with a valid Purchase Order
for the cost of rebuild service. Please contact Trebor International prior to
returning your pump to obtain an RMA Number and Pump Return Data Sheet to
ensure proper safety precautions. Each pump will be evaluated and repaired
within 5 working days of the receipt of pump at Trebor facility.
4.1 PREVENTIVE MAINTENANCE SCHEDULE
The following maintenance schedule is recommended to optimize pump
performance and minimize failures. Certain operating conditions that require
more frequent maintenance intervals have been noted. In positive pressure inlet
conditions where suction or lift is not required, fluid system maintenance may be
extended.
Adhering to the recommended preventative maintenance schedule along with
periodic inspection of the pump will ensure continued efficient operation and
overall reliable pump performance.
It is recommended that the Preventive Maintenance Record (Section 0) be
copied, maintained and kept with this unit for future reference.
PAGE 10 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 11
MAXIM 50D Maintenance Schedule
Install
30 Days
3 Months
6 Months
9 Months
12 Months
15 Months
18 Months
21 Months
24 Months
C-Ring and Detent Legs
R
Distribution Pilots
R
Muffler Media in Base
R
Shaft Seal and Shaft
R
Check Balls and O-Rings
R
Diaphragms
R
Check Plug Seal
R
Suction and Discharge Check Cage
I
I=Inspect, R=Replace
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 11
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Company Name:
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Company Address:
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Product:
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4.1.a Preventive Maintenance Record
PAGE 12 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 13
KR50D-00-B Spares Rebuild Kit, which includes:
Part No
Qty
Description
KM50D-00-B
1
Maintenance Kit
Includes:
(2)
(1)
(2)
(1)
(2)
AK123
AK205
L0197
L0145
AK127
Distribution Pilot Assy
Muffler Assembly
Detent Leg
Detent Ring
Assembly, Muffler
KD50D-00-A
1
Diaphragm Kit
Includes:
(2)
(2)
1700C0047
AK139
Diaphragm
Wear Resist Diaphragm
98001415
4
Check Ball, PTFE
98002334
4
O-ring, -312 PTFE
98003079
2
Shaft Seal
AK004
1
Shaft
AK153
2
Check Cap Seal
KT50-00-B Tool Kit, which includes:
Part No
Qty
Description
98003108
1
Torque Wrench, 30-150 ft/lb., 1/2” Drive
98003150
1
Tool Case, w/Foam, M50
98003305
1
Handle, Soc, 1/4" Drive
98003306
1
Wrench, Adj, 15/16"
T0126
1
Tool, Shaft Insert
T0129
1
Tool, Strap Wrench
T0132
1
Rebuild Fixture
T0144
1
Tool, Wedge, Head Removal, Cleaning Tool
T0146
1
Tool, Pin, 3/4x1/4 Drive
T0147
1
Tool, Pin, 1x1/4 Drive
T0148
1
Tool, Pin, 1/2x1/4 Drive
T0149
1
Tool, Pin, Optic Cap, 3/4
4.2 RECOMMENDED SPARE PARTS
In critical applications, a spare pump is recommended to minimize possible down
time during service intervals.
4.3 TOOLS
The following tool kit is recommended as standard service equipment.
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 13
Page 14
4.4 PARTS ILLUSTRATION
PAGE 14 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 15
ILL
NO
PART NO
QTY
DESCRIPTION
PM
YEAR #
MATERIAL
1
98003277
4
Transfer Tube Nut
PP
2
AK182
4
Transfer Tube
PFA
3
AK149
2
Suction Plug
PTFE
4
AK153
2
Check Port Seal
2
PTFE
5
AK066
2
Suction Seat
PTFE
6
AK068
2
Suction Check
PTFE
7
98002334
4
O-Ring 2 PTFE
8
98001415
4
Check Ball
2
PTFE
9
AK026
2
Discharge Check Cage
PTFE
10
AK123
2
Wear Resist Pilot Assembly
1 & 2
PEEK, PTFE,
PPS
11
AM037
2
Leak Port Seal
PTFE
12
AM040
2
Leak Port Plug
PP
13
AM020
2
Pilot Cap Seal
PTFE
14
AK116
2
Wear Resist Pilot Cap
PP
15
AK003
2
Union Nut PP
(PVDF optional)
16
AK127
2
Muffler Assembly
1 & 2
PP
17
AK120
2
Pilot Sleeve Seal
PTFE
18
AK097
2
Slip Washer
PTFE
19
AK119
2
Head PP
20
AK139
2
Diaphragm, Wear Resistant
2
PTFE
21
1700C0047
2
Diaphragm, Maxim 50
2
PTFE
22
1700B0041
2
Push Plate
PTFE
23
AM075
1
Damper Plug
PTFE
24
AM084
1
Surge Port Seal
PTFE
25
AK065
1
Body PTFE
26
98003079
2
Shaft Seal
2
PTFE
27
AK004
1
Shaft 2 PFA
28
AK205
1
Muffler Assembly
1 & 2
PP
29
1900B0072
1
Exhaust Plug
(Optional for remote exhaust)
PP
30
98003071
3
Screw, PP PP
31
AK088
1
Mounting Base
PP
32
AK108
1
Locking Lever
PP
33
98003080
2
1/4 NPT Fitting
PP
34
AK103
1
Control Base
PP
35
L0104
1
Detent Cap
PP
36
L0113
1
Detent Cap Seal
PTFE
37
L0131
1
Spool Assembly, High Load
Ceramic, PEEK,
Torlon
37a
L0145
1
Detent Ring
1 & 2
PEEK
37b
L0197
2
Detent Leg
1 & 2
Torlon
38
L0105
1
Detent Adapter
PP
39
AK058
1
Shuttle Sleeve Assembly
Ceramic, PTFE
4.5 PARTS LIST
4.6 CLEAN-UP
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 15
To help remove potentially dangerous chemicals prior to service or shipment, the
pump should be flushed with DI water or disassembled and thoroughly cleaned.
Allow DI water to flush through the inlet and out the outlet to prevent pressure
build up.
CAUTION: When handling pump wear appropriate personal protection
gear, including safety glasses.
Page 16
4.7 DISASSEMBLY
During the life of the pump it will be necessary to perform certain preventative
maintenance procedures to ensure its continued high performance. This section
and the next (4.8 Assembly) are provided for the user’s convenience in
disassembly and re-assembly procedures.
Loosen quick grip nuts on the transfer tubes from the pump base using
13/16” open-end wrench.
Remove pump assembly from the pump control base.
Immerse or flush the pump assembly using DI water and a neutralizing agent.
Install mounting fittings in pump adapter ports and lock body into bench
mounting fixture. NOTE: Securely attach mounting fixture to work surface
using hardware provided.
Figure 4-1
Remove the transfer tubes from pump heads (using latex gloves to assist
grip).
Using strap wrench, turn union nuts counter-clockwise to remove.
PAGE 16 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 17
Figure 4-2
Remove head and check diaphragms for cracks or cuts.
To remove diaphragms, slit diaphragm with a sharp knife and pull the
diaphragms from the grooves. (Do not pry on diaphragm seal groove, as
this will damage the sealing surface.)
Unscrew push plate from the shaft in a counter-clockwise direction. Pull
other push plate and shaft from pump body.
CAUTION: Following disassembly, parts should be thoroughly washed
and be free from chemical residue for handling purposes.
4.7.a Body Disassembly
Remove suction plugs and seal on bottom of pump body using 1” pin tool.
Remove suction seat using 1” pin tool.
Remove ball and O-ring.
Unscrew suction check using 1” pin tool turning it counter-clockwise.
Remove second set of O-rings and balls and pull out discharge check cage.
Remove shaft seals from pump shaft seal groove in the center of the shaft
bore using the tip of a razor knife. Take care not to damage the shaft bore.
NOTE: Do not reuse seals.
Remove damper plug and seal using 3/4” pin tool.
4.7.b Head Disassembly
Unscrew and remove pilot cap using the 3/4” pin tool
Remove seal.
Unscrew and remove pilot assembly using 3/4” pilot pin tool and seal.
4.7.c Control Base Disassembly
Unlock control base from quick-change mount by pulling out lever on front of
base to unlock mount. Then slide base back until it stops. Lift base off
mount.
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 17
Page 18
Using pH test strips evaluate whether base has any contamination in air
passages, especially the muffler area. If present, neutralize using best
methods prior to disassembly.
Unscrew and remove muffler assembly from base using the 1”pin tool.
Unscrew and remove the shuttle cap and seal.
Remove shuttle spool assembly from detent adapter.
Remove detent legs and detent ring from spool.
Remove detent adapter from base using 3/4” pin tool.
Do not remove the shuttle sleeve from the shuttle bore.
4.7.d Cleaning
Gently spray clean or dunk rinse all components with DI water to remove any
trace materials remaining after disassembly.
4.8 ASSEMBLY
Prior to beginning assembly, inspect all parts to ensure they are clean and dry.
Wear clean protective gloves. Precautions should be exercised to prevent
contaminating any of the air chamber surfaces with chemicals during handling.
4.8.a Control Base Assembly
Thread detent adapter into shuttle bore using 3/4” pin tool. (Detent adapter
must be flush against base as shown.) torque to 45in-lbs.
Shuttle spool assembly instructions:
Hold shuttle spool (item 1) upright and align slot and in detent legs (item 2)
with notch on shuttle spool, see Fig 1.
Apply pressure upward onto base of detent legs with thumb and index finger,
as shown in Fig. 2.
Tilt the detent ring (item 3) over one of the legs, and align the groove on the
inside of the detent ring with the end of the detent leg. Tilt the other side of
the ring down, expanding it slightly, so that the other detent leg snaps into the
detent ring groove. See Fig. 3. The completed assembly should look like
Fig. 4 (see Figure 4-3).
PAGE 18 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 19
Figure 4-3
Insert spool assembly into detent adapter and shuttle sleeve (do not lubricate
spool or sleeve).
Install seal onto seal groove shoulder
Thread shuttle cap onto detent adapter, torque to 40in-lbs.
Figure 4-4
ATTENTION: Threads should be snug. Do not over tighten.
Thread muffler assembly into base using 1” pin tool, torque to 40in-lbs.
4.8.b Body Assembly
Install seal and damper plug into body using 3/4” pin tool, torque to 50in-lbs.
Remove pump from assembly fixture.
Turn pump upside down to access check bores.
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 19
Page 20
Install discharge check cage into bore making sure small end fits into relief in
bottom of bore.
Drop ball into check cage, then O-ring.
Install suction sleeve into the bore; tighten using 1” pin tool. Tighten until
engagement with O-ring is achieved, then unthread the sleeve a quarter turn.
Do not over tighten as damage may occur.
Install second ball into check cage, then O-ring.
Install suction seat using the 1” pin tool. Tighten until engagement with O-ring
is achieved, then unthread the seat a quarter turn.
Install check seal onto check bore shoulder and thread suction plug into bore
using 1” pin tool, torque to 60in-lbs.
Repeat for the second bore.
Install two shaft seals in shaft bore groove with slits 180 apart.
Thread push plate onto main shaft until engagement with the shaft shoulder
is achieved. Additionally apply a ¼” turn to ensure proper installation.
Thread shaft onto shaft insert tool and insert shaft into bore.
Figure 4-5
Remove shaft insert tool and thread second push plate until engagement with
the shaft shoulder is achieved. Additionally apply a ¼” turn to ensure proper
installation.
4.8.c Final Assembly
Reattach pump to assembly fixture.
Attach union nut to one side of pump body (hand tight). Do not install
diaphragm on this step. This will protect body during initial pump assembly.
Remove pump from the assembly fixture.
Place pump body with union nut down and place two diaphragms, removing
all air from between diaphragms, with “V” groove point toward the body.
NOTE: Make sure wear disk is on diaphragm surface closest to head.
Install head on body. Note tab alignment and orientation of transfer tube
ports in head.
PAGE 20 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 21
Install union nut on pump while gently pressing down on the head to engage
tabs in head and body, spin union nut down hand tight.
Turn pump over and remove union nut to install diaphragms.
Repeat diaphragm, head and union installation.
Lock body into mounting fixture.
Using strap wrench, torque union nuts slowly to 75 ft-lbs with the wrench at
90° +/- 15° to the nut’s surface as shown.
Figure 4-6
Wrap each transfer tube with 3 wraps of Teflon tape and reinstall into the
head ports using latex gloves for added grip. Leave a protrusion height of 2”
for each transfer tube.
Thread pilot assembly and seal into head using 3/4” pilot centering pin tool,
torque to 35in-lbs.
Position pilot cap seal into bore and thread in pilot cap using 3/4” pin tool,
torque to 30in-lbs.
Position control base on mounting base, slide base forward, use locking lever
to secure.
Ensure that the ferrule of the quick grip nut is inserted into the transfer tube
port of the base. Place the gripper seal on top of the ferrule with the tapered
end facing up.
Loosely attach quick grip nuts to transfer tube ports on control base taking
care not to dislocate the ferrule and gripper seal.
Install pump onto control base by inserting transfer tubes in pump into quick
grip nuts on control base.
To secure pump to control base, tighten quick grip nuts one (1) full turn past
hand tight using 13/16” wrench.
Reconnect both air supply and fluid lines.
4.9 TESTING
4.9.a Performance Test
With the air supply at 0 psi open the air supply valve
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 21
Page 22
Increase the air pressure until the pump starts to cycle
Record the start pressure, Target = <20psig
Pump must prime once even cycling is achieved
Increase pressure to 60 psi
Check for fluid leaks & listen for air leaks
Ensure that the pump does not cycle erratically
Close the discharge valve and deadhead for 2 minutes
Pump must not experience machine gunning, erratic cycling or leaks
Open discharge valve and expel the remaining DI water
Prepare the pump for drying
4.9.b Dry Pump
Connect vacuum hose to discharge line
Connect purge line to fluid inlet
60 psig Supply Pressure
Cycle pump & vacuum dry by rotating pump side to side for 30 seconds.
Turn off Air Supply and allow the pump to purge for 5 minutes.
4.9.c Dry Suction
20 psig Supply Pressure Target
Record Suction Value
Target = 12 in-Hg.
PAGE 22 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 23
Pump Will Not Start, Fails to Operate
Cause:
Solution:
Insufficient air pressure.
Must be minimum 20 psig at pump air hook-up.
Insufficient air volume (low supply
pressure during running).
See Performance Charts (3.1) for requirements. Check
for both regulator and control valve capabilities.
Fluid discharge line blocked.
Downstream valve closed, filter plugged
or other obstruction.
Remove obstruction.
Pilot valve failure.
Inspect and replace pilot valve assembly if sticky.
Detent failure.
Inspect detent legs for worn or damaged parts.
Bubbles in Fluid Discharge
Cause:
Solution:
Leaking fluid inlet fitting.
Replace adapter seal.
Leaking main seal.
Tighten union nut to 75 ft-lbs. or replace diaphragms, and
check head and body seal grooves for nicks or scratches.
Pump inlet line pressure reached
saturation point (due to high suction
requirement).
Increase diameter of suction supply line (reduces
restriction).
Reduce output flow.
Ruptured (perforated) diaphragm.
Replace diaphragms.
Check bore caps leaking.
Tighten check bore caps or replace seals.
Fluid Leaks
Cause:
Solution:
Union nut torque not enough to effect
seal.
Tighten union nuts to 75 ft-lbs.
Leaking main seal.
Replace diaphragms.
Check head and body seal grooves for nicks or scratches.
Check bore cap.
Tighten, or remove and replace seal.
Ruptured diaphragm(s) can result in
fluid leaks through air exhaust port.
Replace diaphragms, and any parts that may have been
damaged by fluid exposure.
Erratic Cycling
Cause:
Solution:
Pilot valve failure.
Inspect and replace pilot valve assembly.
Suction line restricted (cavitation).
Reduce fluid restriction.
Detent failure.
Inspect and replace spool assembly.
Check ball(s) not seating.
Check O-rings for damage; replace if necessary.
Make sure check balls move freely in sleeves.
Over pressurization of pump discharge.
Reduce discharge pressure by reducing restriction.
5 TROUBLESHOOTING
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 23
Page 24
6 WARRANTY
See the Trebor Standard Limited Warranty at
www.idex-hs.com/support/trebor/downloads/TreborStandardLimitedWarranty_02-07.pdf
PAGE 24 MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL
Page 25
7 CONTACT INFORMATION
7.1 GENERAL CONTACT INFORMATION
Web: www.treborintl.com
Phone Number: (801) 561-0303
Toll Free Number: (800) 669-1303
Fax Number: (801) 255-2312
Address: Trebor International
8100 South 1300 West
West Jordan, Utah 84088 U.S.A.
7.2 TECHNICAL SUPPORT
7.3 REGIONAL REPRESENTATIVES
Web: www.treborintl.com
MAXIM 50D PUMP OPERATION / MAINTENANCE MANUAL PAGE 25
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