Hunter H41 Operator's Manual page 160

High oil pressure
Sludge in oil
Transmission shifts hard
Notes:
Hunter 41 • Engines and Transmissions
Too heavy grade of oil
Dirt or obstruction in oil line
Infrequent oil changes
Dirty oil filter
Water in oil
Corroded or pinched linkage
11.8
Drain oil and replace. See engine
manual for proper grade
Drain and clear oil system.
Check for bent or flattened oil lines
and replace as necessary
Drain oil and refill with oil of proper
grade and viscosity
Replace filter
Drain oil and refill. See your dealer
if problem persists
Lubricate or replace linkage as
needed