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Hersteller: Graco Inc. Dateigröße: 250.11 kb Dateiname: Unterrichtssprache:

Replace these parts as a complete assembly. 3. Remove the trigger (56). 4. Loosen the setscrew above the trigger safety. Pull off the handle (55). 5. Remove the four manifold retaining screws (60). Pull the housing (50) and gasket (30) away from the air cylinder (1). 6. Remove the bushing (53) from the housing (50) with the screw (54). 7. Remove the screws (60) and lock-washers (61) from the air cylinder (1). 308876 11 Service (Models 965766, 965767, 965768, and 965786 only) Reassembly Air Cylinder Section 1. Lubricate the shaft o-rings (4) and the bearings (5) with grease supplied in the repair kit. Insert o-rings into the air cylinder (1) and air cap (11) cavities. See Fig. 5. 2. Press the bearings (5) flush into the air cylinder housing and air cap, trapping the o-rings (4). 3. Lubricate and reassemble the piston assembly; piston (10), o-ring (9), dowel pin (7), adjustment shaft (42), o-ring (6), and shaft (3). Use Loctite. Primer N7649 and Loctite TL242, 243, or equivalent (“blue” Loctite) when assembling the adjustment shaft (42). Tighten the shaft to 15–20 in–lb (1.7–2.2 Nm). The shaft (3) should hang with some play to be self-aligning in the bearing. 4. Lubricate the air cylinder (1) ID with the grease supplied. Push the piston (10) assembly into the air cylinder. 5. Orient the air inlet manifold (2) (if used) as shown. Match the gasket openings to the air ports. Fluid Section 1. Lubricate the bearing (21), o-ring (16) and cup seal (20). Put the o-ring (16) on the bearing. Carefully insert the seal (20) into the bearing recess, with the lips of the o-ring facing into the bearing. Be careful not to damage the seal lips. 2. Push the bearing (21) seal end first into the housing (19). Be sure that the grease hole in the side of the bearing lines up with the grease ports in the housing (19). 3. Holding the bearing (21) in place, push the bearing assembly over the shaft (3). 4. Lubricate the main fluid seal (22) and its cavity in the housing (26). Carefully press the seal, lip-first, into the housing. 5. Push the housing (26) and seal (22) over the shaft (3) and up against the bearing housing. 6. Apply anti–seize lubricant (Loctite 56765 or equivalent) to the fluid housing screws (23) and loosely install the screws to retain the housings. Do not tighten the screws yet. 7. Insert the gasket (38) and seat (25). These items are reversible and can be installed in either direction. 8. Use Loctite Primer N7649 and Loctite TL242, 243, or equivalent (“blue” Loctite) when assembling the needle (27) and tighten to 15–20 in–lb (1.7–2.2 Nm). 9. Apply air pressure to the CLOSE port, or to the pneumatic trigger valve if installed. This will align the shaft, seal, and bearing. Tighten the fluid housing screws (23) oppositely and evenly to 40–45 in-lbs (4.5–5 Nm). 10. Install the nosepiece (40) with the PTFE o-ring (39), screw (15), and snuff-back ring (41), if used. The snuff-back ring has an internal bevel on one end which faces into the nosepiece. Tighten the nosepiece screws to 15–20 in-lbs (1.7–2.2 Nm). 12 308876 Service (Models 965766, 965767, 965768, and 965786 only) Air Valve (if equipped) 1. Insert the spring (51) into the housing (50). 2. Lubricate and install an o-ring (46) into the housing. 3. Install a spacer (52), internal bevel first, into the housing. 4. Lubricate and install two o-rings (46) and the spacer (51). 5. Lubricate and install a spacer (52) with the internal bevel out, and o-ring (46). 6. Lubricate and install o-rings (48) on the spool (49). Insert the spool with the nub facing out. 7. Lubricate the pin (59) and insert it into the guide (58). Screw the guide with o-ring (57) into the housing. Tighten it to 60–70 in-lbs (6.8–7.9 Nm). 8. Orient the gasket (30) to the holes on the air cylinder (1). Screw the air valve assembly to the cylinder with the screws (60) and lock-washers (61). TIghten the screws evenly to 15–20 in-lbs (1.7–2.2 Nm). 9. Screw the bushing (53) to the housing (50) with the screw (54). Tighten the screw to 140–150 in-lbs (15.8–16.9 Nm). 10. Attach the handle (55) with the setscrew. 11. Attach the trigger (56) with the grease fittings (18). 12. Test that the trigger safety works properly. Electric Switch 1. The switch, housing, and cable are not repairable. Replace these parts as a complete assembly. 2. The switch, housing, and cable assembly are not user serviceable and must be replaced as an assembly. 308876 13 14 308876 Service (Models 965766, 965767, 965768, and 965786 only) 8371A 2 9 10 16 6 5 4 3 28, 29 20 21 22 39 41 23 40 38 25 27 Fig. 5 1 3 4 2 19 18 26 1 11 12 30 56 61 60 53 54 55 47 46 48 49 51 52 58 59 57 50 8370A Tighten to 15–20 in-lb (1.7–2.2 Nm). The shaft should hang with some play to be self-aligning in the bearing. Tighten to 15–20 in-lbs (1.7–2.2 Nm). Tighten oppositely and evenly to 40–45 in-lbs (4.5–5 Nm). Lubricate with grease supplied in the repair kit. Tighten to 60–70 in-lbs (6.8–7.9 Nm). Screw the bushing (53) to the housing (50) with screw (54). Tight...

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