Safety Valvehnspection And Replacement; Belt-Replacement; Adjusting Belt Tension - Craftsman 919.167800 Owner's Manual

Safety Valve - Inspection and Replacement
IF THE SAFETY VALVE DOES NOT WORK
PROPERLY, OVER-PRESSURIZATION MAY
OCCUR, CAUSING AIR TANK RUPTURE OR
EXPLOSION. OCCASIONALLY PULL THE
RING ON THE SAFETY VALVE TO MAKE
SURE THAT THE SAFETY VALVE OPER-
ATES FREELY. IF THE VALVE IS STUCK OR
DOES NOT OPERATE SMOOTHLY, IT
MUST BE REPLACED WITH A VALVE
HAVING THE SAME PRESSURE RATING.
The safety valve is set at the factory to a pressure
approximately 15 pounds higher than the rated
pressure of the outfit. If the pressure switch malfunc-
tions and does not shut off the motor automatically at
maximum tank pressure, the safety valve will protect
the air tank against excessive air pre_sure by popping
off at its preset pressure.
Two stage compressor pumps equipped with after-
coolers will have a second safety valve installed on the
aftercooler.
Safety Valve
Belt- Replacement
(Refer to the Outfit Parts Bulletin for
replacement belt part number.)
SERIOUS INJURY OR DAMAGE MAY OC-
CUR IF PARTS OF THE BODY OR LOOSE
ITEMS GET CAUGHT IN MOVING PARTS.
NEVER OPERATE THE OUTFIT WITH THE
BELT GUARD REMOVED. THE BELT GUARD
SHOULD BE REMOVED ONLY WHEN THE
COMPRESSOR POWER IS DISCON-
NECTED.
.
T_rn
and
l
the.,
_ompressor off, lock out the power supply,
_lieve all air pressure from the tank.
ve the belt guard. If the guard is plastic,
the front of the belt guard by disengaging
tps. Insert a flat bladed screwdriver at each
>cation and pry the belt guard apart.
If _he_i_eltguard is wire mesh remove four screws,
four _iiPS and outer panel of belt guard.
3. F_ _0mpressors with a motor tilt plate, loosen the
wi#g _ut at the tilt plate. The motor can be tilted to
all_for easy removal or installation of the belt.
Fo_"€_mpressors with a motor slide mount, oosen
the r_0tor mounting hardware and slide the motor ....
to_aI_ the compressor.
4. Re_e the belt and replace with a new one.
AdjuStil !g Belt Tension
Adjust be i tension as described below.
For corin_ _ssors with motor tilt plate, tighten the wing
nut until il _akes contact with the washer, plus one
additiona i_rn.
For co_10_essors with a motor slide mount adjust belt
teosior a fo,ows:
1. Slide _otor away from compressor until desired
tentic_._, , s obtained.
DRIVE BELT
DOWNWARD FORCE
MIDWAY
DEFLECTION
MOTOR
PULLEY
On two is e comoressors, the belt should deflect 3/
16" at _id_ay between the pulley and the flywheel
when a 5 _ound weight is applied at the midway
point.
2. Tigllte_l two outside cap screws enough to hold
the m_tor in place for checking pulley and fly-
wheel_lignment.
15-ENG D20437 Rev. 0 2/15/00