TM  10-3930-643-34 TROUBLESHOOTING  SYMPTOM  INDEX.  (cont) 3-1. Troubleshooting Index. (cont) Paragraph/ Malfunction Page SERVICE  BRAKE Brakes do not engage Brakes do not release Brakes  squeal  or  scrape Low air pressure High air pressure Noisy  compressor PARKING  BRAKE Parking brake drags Parking brake slips STEERING Slow steering at low engine RPM and slow boom hydraulics at high engine RPM Slow  steering Noisy  operation Hydraulic  oil  heating  up Insufficient  steering  pressure Sticking  control  valve  plunger Play in steering gear Hard  steering  while  driving HYDRAULIC  SYSTEM All implements fail to operate All  cylinder  assemblies  operate  slowly A  particular  cylinder  assembly  operates  slowly Loss  of  cylinder  motion  during  operation Load slowly drops with lift control lever in “hold” Momentary drop of load when lift control lever is moved from “hold” to “raise” or “raise” to “hold” Noisy  operation Hydraulic oil heating up Insufficient  pump  pressure  build-up Sticking loader control valve spool(s) Hydraulic pump not delivering oil Oil leakage at hydraulic pump 8-la 8-2 8-1b 8-2 8-1c 8-2 8-1d 8-3 8-1e 8-4 8-1f 8-4 8-2a 8-2b 9-1a 9-1b 9-1c 9-1d 9-1e 9-1f 9-1g 9-1h 12-1a 12-1b 12-1c 12-1d 12-1e 12-1f 12-1g 12-1h 12-1i 12-1j 12-1k 12-1l 8-5 8-5 9-2 9-2 9-3 9-3 9-3 9-4 9-4 9-5 12-2 12-2 12-3 12-4 12-5 12-5 12-6 12-6 12-6 12-7 12-8 12-8 3-4

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