CLEANING AND INSPECTION - TM-5-3820-256-24-4

TM-5-3820-256-24-4 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
Page Navigation
151

SERVICE MANUAL 9. Scribe alignment marks on check valve body (6) and body (17) for reassembly purposes. Remove the four cap screws ( 19 & 25) so that check valve body (6) can be separated from body (17). 10. Remove O-ring (7) and valve seal (8) from body (17). CLEANING AND INSPECTION Wash all metal parts in cleaning solvent, then dry. Discard all rubber parts which are supplied with service kit. Examine covers, check valve body, piston and body. All contacting surfaces for O-rings must be smooth, round and free of deep scratches, dents or gouges. Valve seat at end of piston and in the check valve body must be smooth showing no dents or distortion. The sealing surfaces in the cover must be smooth and free of dents and gouges. Snap ring groove in valve body must not be distorted and must be free of corrosion. Replace parts that show any of the above defects. REASSEMBLY Lubricate all seals and sliding surfaces using Item 1 in LUBRICANT SPECIFICATIONS. Refer to Fig. 4 for numbers in parenthesis. 1. Position valve (8) in body (17) so that the valve lays flat on flutes of body. 2. Position O-ring (7) in groove of the flange of valve body. 3. Position check valve body (6) on body (17) aligning scribed alignment marks. Install cap screws (19 & 25). Tighten cap screws to 13.56- 15.82 Nm (120-140 in. lbs.). 4. Position O-rings (5) in grooves in both covers (2 and 4). 5. Position check valve discs (3) on valve seats in the check valve body. 6. Position hand control cover (2) on check valve body adjacent to foot valve no. 1 port, then install foot valve no. 2 cover (4). Tighten screws to 1.- 1.808 N•m (12-16 in. lbs torque. 7. Position O-ring (9) in valve body and O-ring on piston (10). Insert piston assembly with tapered end toward check valve body. 8. Position spring (12) in piston and place exhaust disc (13) on spring. Align and push exhaust disc firmly into valve body. While holding spring in valve body, install snap ring (16), making sure it seats properly in valve body. 9. Position valve disc (21), O-ring (20) and plug (22) in bleed back opening (D). Then install star washer (23). When reinstalling manifolded tractor protection valve on vehicle, be sure to perform the service checks before releasing the vehicle for service. CTS-4079 - CHAPTER XI - Page 10

Privacy Statement
Press Release
Contact