Gravely Pro-walk hydro 36HR PG Owner's/Operator's Manual page 47

Engine
Engine Uses Too Much Oil
Engine Backfires Through Muffler Throttle should be at low idle for several seconds before
High Fuel Consumption
Electrical System
Problem
PTO Clutch Does Not Engage
Parking Brake
Problem
Parking Brake Not Working
Correctly
Steering
Problem
Steering Not Working
Unit Will Not Follow a Straight
Path
Unit Moves to the Left or Right
With Engine Running and
Transmission in Neutral
TROUBLESHOOTING
Find and correct oil leaks.
Incorrect engine oil.
Plugged oil filter.
Plugged air intake filter.
turning off unit.
Leaking/damaged exhaust manifold gasket.
Improper type of fuel.
Plugged air intake system.
Operating at too fast ground speed for conditions.
Improper valve clearance. See servicing dealer.
Restricted air intake system.
Probable Cause
Faulty 20-amp fuse (main power circuit). (988154, 55, 57,
58, 59)
Faulty PTO switch.
Faulty PTO clutch.
Loose PTO clutch connections.
Faulty relay or relay connection(s). See Replacing Relays
on page 43.
Probable Cause
Parking brake out of adjustment. See ADJUSTING
PARKING BRAKE on page 21.
Brake components damaged.
Probable Cause
Parking brake locked.
Pump bypass valves partially open.
Improper tire inflation.
Hydrostatic transmission oil low.
Traction drive belt slipping.
Traction drive belt damaged or worn.
Steering linkage detached.
Steering linkage out of adjustment. See STEERING
CONTROL LEVER NEUTRAL ADJUSTMENT on
page 25.
Pump linkage (neutral position) out of adjustment. See
ADJUSTING PUMP NEUTRAL POSITION on page 26.
GB - 47