Giant LP200-SS, Operating Instructions/ Repair And Service Manual

10

Pump System Malfunction

MALFUNCTION

CAUSE

REMEDY

The Pressure and/ 

Worn packing seals 

Replace packing seals

or the Delivery 

Broken valve spring 

Replace spring

Drops 

Belt slippage 

Tighten or Replace belt

Worn or Damaged nozzle 

Replace nozzle

Fouled discharge valve 

Clean valve assembly

Fouled inlet strainer 

Clean strainer

Worn or Damaged hose 

Repair/Replace hose

Worn or Plugged relief valve on pump 

Clean, Reset, and Replace worn parts

Cavitation 

Check suction lines on inlet of  

pump for restrictions

Unloader 

Check for proper operation

Water in crankcase 

High humidity 

Reduce oil change interval

Worn seals 

Replace seals

Noisy Operation 

Worn bearings 

Replace bearings, Refill crankcase  

oil with recommended lubricant

Cavitation 

Check inlet lines for restrictions

and/or proper sizing

Rough/Pulsating 

Worn packing 

Replace packing

Operation with 

Inlet restriction 

Check system for stoppage, air  

Pressure Drop 

leaks, correctly sized inlet   

plumbing to pump

Accumulator pressure 

Recharge/Replace accumulator

Unloader 

Check for proper operation

Cavitation 

Check inlet lines for restrictions    

and/or proper size

Pressure Drop at Gun 

Restricted discharge plumbing 

Re-size discharge plumbing to    

flow rate of pump   

Excessive 

Worn plungers 

Replace plungers

Leakage 

Worn packing/seals 

Adjust or Replace packing seals

Excessive vacuum 

Reduce suction vacuum

Cracked plungers 

Replace plungers

Inlet pressure too high 

Reduce inlet pressure

High Crankcase 

Wrong Grade of oil 

Giant oil is recommended 

Temperature 

Improper amount of oil in crankcase 

Adjust oil level to proper amount

Check

Daily Weekly 50 Hrs. Every 

500 Hrs.

Every 

1500 Hrs.

Every 

3000 Hrs.

Oil Level/Quality

X

Oil Leaks

X

Water Leaks

X

Belts, Pulley

X

Plumbing

X

Oil Change                         

(1 Gallon) p/n 01154

X

X

Plunger Seal Kit                

(1 kit/pump)  See page 5

X

Valve Repair Kit               

(2 kits/pump) See page 5

X

Preventative Maintenance Check List  & Recommended Spare Parts List

Recommended Spare Parts