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REED Trailer Pump Troubleshooting Guide


DISCLAIMER: Official REED Service Manuals deal with the various aspects of Operation, Preventative Maintenance, System Care and Maintenance, Component Adjustment, Repair and Replacement. However, like anything mechanical and due to application of pumping concrete, the possibility exists that at one time or another conditions may arise that will cause the machine to malfunction. These conditions may not be as apparent as a broken part, etc., but recognizing the symptoms will assist in determining the cause and repair and reduce the downtime. This Troubleshooting Guide depicted below is designed to assist you in recognizing the possible symptoms, a probable cause and a suggested corrective action. The format used identifies a major component or system and categorizes the potential failure for that specific area with the symptom. The items listed are based on symptoms and malfunctions derived from our experience with the REED Pump and from your calls to our Service Department. It is also our intent to upgrade this website periodically. Please email any questions or suggestions for improvement to mike.newcomb@reedmfg.com


ENGINE

1.    CRANKS, BUT FAILS TO START

2.    DOES NOT CRANK

3.    OPERATING AT VERY LOW R.P.M.

4.    BOGS DOWN WITH FULL THROTTLE, FULL VOLUME AND PUMP SWITCH ON

 

MAIN HYDRAULIC PUMP

5.    FAILS TO DELIVER REQUIRED VOLUME AND PRESSURE

6.    EXCESSIVELY NOISY

AUXILARY GEAR PUMP

7.    FAILS TO DELIVER REQUIRED VOLUME AND PRESSURE

 

CONCRETE PUMP PISTONS

8.    CYLINDERS WILL NOT STROKE

9.    CYLINDERS NOT FULLY EXTENDED SHORT STROKE

10.           MATERIAL CYLINDERS NOT FILLING WITH CONCRETE

11.           SLURRY IN WATER BOX

12.           PISTON CUPS SQUEAL IN OPERATION

 

SWING TUBE SHIFTING

13.           S-TUBE DOES NOT SHIFT PROPERLY

14.           S-TUBE DOES NOT COMPLETELY SHIFT OVER COVERING MATERIAL CYLINDERS

HYDRAULIC SYSTEM

15.           HYDRAULIC FLUID GETS HOT

REMIXER

16.           REMIXER WILL NOT ROTATE

 

RADIO REMOTE CONTROL

17. RADIO CONTOLLER NOT FUNCTIONING

 


ENGINE

1.    CRANKS, BUT FAILS TO START

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

         NO FUEL fill up fuel tank with a good grade of diesel fuel. No dirt or particles

         DIRTY FUEL FILTER replace filter.

         CLOGGED FUEL LINE (a) check and clean in-line filter (b) disconnect fuel line and air blow clean

         LEAK IN FUEL SUPPLY LINE (a) check all connections and hoses including the return lines (b) pressure test if necessary

         FUEL SOLENOID - (a) check for voltage (b) remove and see if trigger activates

        DIRTY INJECTORS clean or replace injectors

 

2.    DOES NOT CRANK

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        LOW BATTERY check battery output, recharge or replace

        BATTERY CABLES LOOSE clean and tighten cables, check ground connection

        IGNITION KEY SWITCH IS FAULTY check power across contacts, replace if damaged

        STARTER FAULTY (a) check for power at starter (b) replace

 

3.    OPERATING AT VERY LOW R.P.M.

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        THROTTLE NOT ADJUSTED PROPERLY reset using throttle control

        THROTTLE LEVER ON ENGINE STICKING (a) check movement, apply lubricant (b) spring binding check connection

        THROTTLE CONTROL CABLE (a) check that cable moves freely when control is pulled (b) check cable for any kinks (c) check connection at throttle lever

        RPM SPEED NOT PRESET PROPERLY (a) adjust to correct speed; idle speed 800 RPM (b) maximum high speed no load (refer to specification sheet)

 

4.    BOGS DOWN WITH FULL THROTTLE, FULL VOLUME AND PUMP SWITCH ON

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        DIRTY AIR CLEANER clean or replace

        DIRTY FUEL FILTER check or replace

        MAIN RELIEF VALVE SET TOO HIGH readjust as necessary

        ENGINE OVERLOADED OR SUBJECT TO EXTREMELY HIGH PRESSURE CONDITIONS (a) back off (decrease) volume control on main pump

        HORSEPOWER LIMITER ON MAIN PUMP MISADJUSTED (units with HA10V071 Pumps Model B30HP, B40, M40B, 4040B) contact REED service at (909) 287-2100

 

MAIN HYDRAULIC PUMP

5.    FAILS TO DELIVER REQUIRED VOLUME AND PRESSURE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        ENGINE SPEED TOO LOW (a) adjust throttle control to full open (b) readjust engine maximum no load speed to specified RPM

        VOLUME CONTROL SET TOO LOW adjust control to full on (open)

        PRESSURE GAUGE DEFECTIVE - (a) install test gauge to verify (b) replace if defective

        LOAD SENSE VALVE NOT WORKING PROPERLY (a) improper adjustment (b) contamination, remove and clean (c) defective replace

        PRESSURE SETTINGS INCORRECT check pressure and adjust accordingly (refer to Adjustment section of your pumps manual for proper pressures)

        EXCESSIVE PUMP WEAR (a) loose or worn parts (b) flow test to determine if pump output is satisfactory

 

6.    EXCESSIVELY NOISY

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        INSUFFICIENT OIL (a) check oil level in tank (b) suction strainer clogged clean

        AIR IN SYSTEM (a) check for vacuum leak in suction line, connection (b) aeration bubbles of fluid in reservoir

        EXCESSIVE SYSTEM PRESSURE (ABOVE PUMP RATING) check relief valve operation and setting

        EXCESSIVE PUMP WEAR loose or worn pump parts replace

        ENGINE RPM HIGHER THAN THE PUMP RPM RATING adjust RPM as necessary

 

AUXILARY GEAR PUMP

7.    FAILS TO DELIVER REQUIRED VOLUME AND PRESSURE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        INSUFFICIENT OIL suction strainer clogged clean

        AIR IN SYSTEM (a) check for vacuum leak in suction line, connection (b) aeration (bubbles of fluid in reservoir)

        WORN OR DAMAGED PARTS replace pump

        SYSTEM RELIEF SET TOO LOW OR BYPASSING (IF APPLICABLE) install pressure gauge in circuit and dead head. Adjust relief

 

CONCRETE PUMP PISTONS

8.    CYLINDERS WILL NOT STROKE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        PUMP SWITCH IS NOT ON turn to on position

        ENGINE SPEED TOO LOW increase RPM to maximum

        VOLUME CONTROL TOO LOW open to full on

        ELECTRICAL (a) check fuses (b) check connection to pump switch, continuity to terminals (c) check for broken wires, dirty terminals (d) check electrical connection and voltage on main cycle valve (e) proximity sensor gap too large check using key gauge (f) proximity sensor faulty (g) check prox (proximity) switches on machine by passing a piece of steel under each prox switch with engine running and pump switch off. S-tube (swing tube) should swing each time either prox switch is signaled.

        LOW VOLTAGE check battery, voltage to solenoid main cycle valve

        FAULTY BLACK BOX - replace

 

9.    CYLINDERS NOT FULLY EXTENDED SHORT STROKE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        PROXIMITY SWITCHES ARE MISADJUSTED (a) check that switches are positioned for full stroke reposition. Do not exceed 200 PSI spike on pressure gauge when at full volume and full RPM. Pressure spike indicates cylinders are bottoming out (b) check that both proximity switches are in identical positions

        TOO MUCH HYDRAULIC OIL ON ROD SIDE OF HYDRAULIC CYLINDERS (a) actuate and hold TEST switch, turn pump switch ON and actuate either CYL A B switch until cylinder being extended bottoms out (full extension). Resume normal operation (b) inspect check valve on barrel side of cylinder clean or replace if faulty (c) cylinder piston seals are leaking - replace

 

10.                       MATERIAL CYLINDERS NOT FILLING WITH CONCRETE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        BAD CONCRETE MIX check mix design

        PUMP SPEED TOO FAST adjust to suit type of mix

        FAULTY PISTON O-RINGS/PISTON CUPS replace

        PUMP OPERATING IN REVERSE place pump switch in FORWARD

 

11.                       SLURRY IN WATER BOX

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        PISTON CUPS IN MATERIAL CYLINDER ARE WORN OR LOOSE (a) check tightness (b) replace with new cups

        CONCRETE CYLINDERS EXCESSIVELY WORN (a) replace

 

12.                       PISTON CUPS SQUEAL IN OPERATION

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        IMPROPERLY INSTALLED CUPS piston plate mounting bolts over-tightened causing piston cups to distort (*note* - during break-in of new cups, squealing is normal)

SWING TUBE SHIFTING

13.                       S-TUBE DOES NOT SHIFT PROPERLY

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        CONCRETE BUILD-UP IN AREA OF WEAR RING OR WEAR PLATE IN HOPPER clean out and remove build-up . Concrete mix is not favorable or there is an obstruction in the hopper or S-Tube.

        S-TUBE ADJUSTED TOO TIGHT loosen large nut at bellcrank one-two flat turns. HOWEVER, this only applies immediately after a hopper rebuild. This nut should never need to be loosened.

        BINDING CAUSED BY MATERIAL BUILD-UP BEHIND THRUST RING AND WEAR RING remove and clean up area replace thrust ring if damaged.

         WEAR PARTS ARE WORN OUT!

         SOFT SHIFT/HARD SHIFT VALVE (IF EQUIPPED) IN SOFT POSITION

         INSUFFICIENT LUBRICATION check and lubricate shaft housing and outlet housing

        ACCUMULATOR PRE-CHARGE PRESSURE TOO LOW (a) pre-charge to 1000 PSI (b) replace bladder if pressure does not hold

        SHIFT CIRCUIT PRESSURE TOO LOW (a) check engine RPM (b) check system pressure relief to be typically set at 2000 PSI (consult your manual) (c) check gear pump replace if faulty . The swing circuit has an internal leakage problem where the stored pressure in accumulator has dropped significantly and is at the low end of pressure range when the time comes to shift S-Tube. Ideally, the swing circuit should hold pressure for at least 30 seconds before it automatically recharges (pump not cycling)

        UNLOADER MANIFOLD check relief valve cartridge works properly free of contamination (b) solenoid cartridge connections tight (c) solenoid coil in good condition and shows 12 volts (d) solenoid spool shifts easily (e) directional control valve in working condition (f) inspect check valve for contamination

        SHIFT CYLINDER SEALS BYPASSING OIL (a) check by disconnecting one of the hoses from cylinder. as example: if rod is extended, disconnect rod side hose. Pressure barrel side of cylinder. If oil comes out of rod side port or hose, then seals are bypassing oil. (b) replace seals or cylinder

        SWING VALVE NOT SHIFTING PROPERLY (a) check voltage to solenoid, 12 volts or more (b) check for contamination clean or replace

 

14.                       S-TUBE DOES NOT COMPLETELY SHIFT OVER COVERING MATERIAL CYLINDERS

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        CHECK FOR OBSTACLE IN HOPPER SUCH AS CONCRETE, WEAR PLATE, WEAR RING BINDING, ETC. clear obstacle

        SHIFT CYLINDER OUT OF ADJUSTMENT adjust cylinder rod at clevis. Loosen locknut and turn rod with wrench. Make sure wrench is placed on flats provided on cylinder rod

        BELLCRANK NOT INSTALLED PROPERLY disconnect attaching parts and remove bellcrank from spline adjust S-tube and reposition bellcrank on spline. Reinstall attaching parts, adjusting cylinder

 

HYDRAULIC SYSTEM

15.                       HYDRAULIC FLUID GETS HOT

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        OIL COOLER NOT FUNCTIONING PROPERLY (a) restricted air flow to cooler clean outside cooler fins (b) open engine compartment doors (if applicable) to dispense hot air (c) on electric fan unit, check fuse and electrical connection, fan rotating in wrong direction, motor burned out

        FILTER ELEMENT CLOGGED replace

        BREATHER CAP ON TANK CLOGGED remove, soak in solvent, air blow dry

        SUCTION STRAINERS CLOGGED drain tank, remove strainers, clean or replace

        RELIEF VALVE SET TOO LOW (a) reset to proper specified pressure (b) replace cartridge if faulty

        OPERATING TOO LONG AT HIGH PRESSURE (a) use larger size delivery line over long distances (b) mix may be bad causing higher pump pressure

        HYDRAULIC OIL LEVEL TOO LOW fill to proper level

 

REMIXER

16.                       REMIXER WILL NOT ROTATE

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        CHECK CONNECTION OF AGITATOR TO DRIVE SHAFT broken or missing bolt

        FROZEN IDLER PIN remove, clean, and lubricate

        BROKEN KEY IN DRIVE SHAFT COUPLING check and install new key or coupling

        NO HYDRAULIC FLOW TO MOTOR (a) needle valve closed open (b) control valve malfunctioning check valve operation

        NO OR VERY LITTLE OIL FLOW TO CONTROL VALVE check flow replace tandem pump

        HYDRAULIC MOTOR FAULTY - replace

 

RADIO REMOTE CONTROL

17.                       RADIO CONTOLLER NOT FUNCTIONING

[PROBABLE CAUSES & CORRECTIVE ACTIONS]

        BATTERY NEEDS RECHARGING/REPLACING recharge or replace

        ANTENNA NOT FUNCTIONING check antenna and connections

 

 

Description: Description: REED Concrete Pumps and Guncrete Gunite Machines.

Call Us Toll-Free: 888 -779-7333

Outside US: (909) 287-2100
Fax: 909-287-2140
REED - An Independent Member of the Shea Family of Companies
13822 Oaks Avenue, Chino, CA, 91710, USA

e-mail: mike.newcomb@reedmfg.com