Gravely HR1536FL - Page 35

GB - 35
Electrical System
Machine
Parking Brake
Engine Backfires Through Muffler Throttle should be at low idle for several seconds before
turning off unit.
Leaking/damaged exhaust manifold gasket.
High Fuel Consumption 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.
Problem Probable Cause
Problem Probable Cause
PTO Clutch Does Not Engage Faulty 20-amp fuse (main power circuit) (988147, 148).
Faulty PTO switch.
Faulty PTO clutch.
Loose PTO clutch connections.
Faulty relay or relay connection(s) (see Replacing Relays
(988147, 148) on page 31).
Problem Probable Cause
Excessive Machine Vibration Engine speed too slow.
Deck drive belts worn or damaged.
Pump drive belt worn or damaged.
Dirt or debris on drive sheaves.
Loose or damaged electric PTO or drive sheave.
Bent or damaged cutting blades.
Unit Will Not Move With Engine
Running
Parking brake locked.
Hydraulic oil level low.
Hydraulic oil cold - allow engine to warm.
Pump drive belt slipping.
Pump bypass valves open.
Pump drive belt damaged or worn.
Wheel motor problems. See your Gravely dealer.
Unit Creeps With Engine
Running and Control Levers in a
Neutral Position
Needs control linkage adjustment.
Problem Probable Cause
Parking Brake Not Working
Correctly
Brake components damaged.