Smithco Spray Star 1600P (sn 0979 – 0991) Parts & Service Manual - Manual (Page 14)

Ser
vice
12
ADJUSTMENTS
INTERLOCK SWITCH
Located on the front, below the floorboard and behind the clutch. The Interlock Switch is in the electrical circuit
between the starter solenoid and the starter on the ignition switch. When the clutch pedal is depressed, it
pushes the plunger on the interlock switch in, which creates a circuit. Thus allowing the engine to start. When
the clutch pedal is released the plunger on the interlock switch comes out, which breaks the circuit. To adjust,
loosen the two nuts holding the interlock switch and move the interlock switch towards or away from the clutch
pedal as needed.
HYDRAULIC POWER UNIT BELT
Located to the rear and left of the engine. Should have approximately 1 /
4
" (6.5 mm) of deflection in the center of
the top strand. To adjust, loosen the bolt holding the hydraulic power unit bracket to the frame and adjust the belt
tension as required. Retighten the bolt after the adjustments made.
FOOT CLUTCH BELT
See belt and pulley drawing in this book. Belt retainer should be adjusted so that there is 1 /
8
" to 1 /
4
" (3.25 to 6.5
mm) clearance between the belt and retainer with the clutch fully engaged. This is just a starting point. Start the
engine with the transmission in neutral and the park brake set. Engage and disengage the clutch, check to see
if the belt has stopped and is against the retainers. If not shut engine off and readjust the retainers. Adjust the
clutch rods as required to shorten, turn the ball joints in and out to lengthen.
SPRAY PUMP WITH ELECTRIC CLUTCH BELT
Located to the rear and left of the engine. Should have approximately 1 /
2
" (13 mm) of deflection in the center of
the top strand. Loosen and tighten the 3 /
8
- x 2 1 /
2
set screw located on the frame pushing against the pump
arm.
PARK BRAKE
Adjust on lever. Adjust on clevis.
BRAKES
Can be adjusted from outside of brake drum with a brake tool.
SPEED CALIBRATION NUMBERS
The speed calibration number for the Spray Star 1602 is 114. This is measured off the drive shaft.
The speed calibration number for the Spray Star 1607 is 621. This is measured off the drive shaft.
STORAGE
If the engine will be out of service for two or more months, use the following storage procedure.
1. Clean the exterior surfaces of the engine.
2. Change the oil and filter while the engine is still warm from operation.
3. The fuel system must be completely emptied, or the gasoline must be treated with a stabilizer to prevent
deterioration.
If you choose to use a stabilizer, follow manufacturers recommendations, and add the correct amount
for the capacity of fuel system. Fill fuel tank with clean, fresh gasoline. Run engine for 2-3 minutes to get
stabilized fuel into carburetor. Close fuel shut-off valve when unit is being stored or transported.
To empty the system, drain fuel tank and carburetor, or run engine until tank and system are empty.
4. Remove the spark plugs. Add one tablespoon of engine oil into each spark plug hole. Install plugs, but
do not connect the plug leads. Crank the engine two or three revolutions.
5. Store machine in a clean, dry place.