3-16. SANDER CONTROL VALVE (cont)
CLEANING, INSPECTION, AND REPAIR
Dry-cleaning solvent P-D-680 is toxic and flammable. Wear protective
goggles and gloves and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes and don't breathe vapors. Do not use near open
flame or excessive heat. The flash point is 100 138°F (38 59°C). If you
become dizzy, get fresh air and medical aid immediately. If contact with
eyes is made, wash your eyes and get medical aid immediately.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa).
Do not direct compressed air against skin. Use goggles or full face shield.
Use a cloth dampened in dry-cleaning solvent and remove grease and oil from exterior and interior of valve body
Use dry-cleaning solvent and clean metal parts. Dry with compressed air.
Inspect metal parts for cracks, breaks, cuts, or other damage. Replace damaged parts.
Check that springs are not rusted or distorted or have taken a permanent set. Replace damaged springs.
Measure free height of spring (6). Minimum free height is 1-7/16 inch (36.5 mm). Replace damaged spring.
Measure free height of spring (18). Minimum free height is 31/32 inch (24.6 mm). Replace damaged spring.
Use repair kit and replace the following:
O-rings (3), (25), (26), (30), (31), (34), and (39)
Valve seat (10)
Plunger seats (20) and (22)
Rubber cup (32)
Use a multimeter and measure resistance of coil case (15). Resistance should be 330 ±5% ohms. If this reading
is not obtained, replace defective coil.
Use silicone grease and lubricate O-rings (3), (13), (25), (26), (30), (31), (34), and (39), actuating piston (33), and
rubber cup (32). Use a clean cloth and remove excess grease.