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6280 PROCEDURES
INSPECTION OF INTERNAL PARTS
Visual inspection of internal parts can be done without
draining tank.
• Remove two lifting bail eyebolts and the two bolts
from the back of the tank.
• Carefully lift tank 3'' to 4''.
• Using a flashlight, inspect drive chain, hoses, front
seal on motor, and suction and pressure line
on pump.
• If service is necessary, follow procedure for
tank removal.
SPEED CONTROL
• Speed control knob can be adjusted while machine
is running.
• Turning speed control knob counter clockwise will
make machine run faster (See Figure C).
• Turning speed control knob clockwise will make
machine run slower (See Figure C).
SPEED CONTROL REPLACEMENT
• Use a 3/32'' allen wrench to remove plastic knob.
• Use a 1'' deep socket to remove and replace speed
control valve.
• Re-install plastic knob.
PRESSURE VALVE REPLACEMENT
This has been factory set and should not be tampered with.
• Use a 1'' deep socket to remove old unit and install
new.
FORWARD AND REVERSE SWITCH
REPLACEMENT
• Disconnect power source to unit.
• Remove 2 1/4 - 20 x 1/2 hexhead bolts from handle.
Use 7/16 diameter wrench or socket.
• Loosen 9/16 nut that secures switch to handle.
• Remove handle and switch.
• Remove 2 spade connectors from switch.
• For switch replacement, bend the 2 prongs 90º from
both ends of switch. Use old switch as a pattern.
Speed
Control
Faster
Slower
Figure C
Counter
Clockwise
Clockwise