Service
Service
Displacement Pump Service
Pump Repair Kit 238286 is available and includes repair parts for the pump and air motor. Use all parts in the kit for best results.
1.Flush the pump.
2.Relieve the pressure before proceeding, page 6.
3.Disconnect the hoses, remove the pump from its mounting, and clamp the air motor base (5) in a vise horizontally by closing the vise jaws on the flange.
4.Unscrew the intake valve body (107) from the fluid cylinder (105). Disassemble the intake valve. (See Parts Drawing Page 12.) Clean and inspect the parts for wear or damage, and replace parts as needed. be sure to check the
5.Use strap wrench on the fluid cylinder (105) to screw it out of the air motor base (5). Carefully inspect the smooth inner surface on the cylinder for scoring or irregular surfaces. Such damage causes premature packing wear and leaking, so replace the part if it is damaged.
6.Using wrenches on the flats of the displacement rod
(8)and on the flats of the fluid piston (11), unscrew the fluid piston from the displacement rod.
7.Take the ball (111) out of the displacement rod (8), and take the packing
8.Clean and inspect all parts. Use all the repair kit parts during reassembly and replace other parts as necessary.
9.Place the piston ball (109) in the displacement rod
10.Install the new packing
11.Clamp the flats of the fluid piston (110) in a vise, and torque the displacement rod (8) to the piston to 40 to 60
12.Clamp the air motor base (5) in a vise horizontally by closing the vise jaws on the flange.
13.Use a strap wrench to screw the displacement pump cylinder (105) to the air motor base (5), and torque to 95 to 105
14.If the ground wire was disconnected before servic- ing, be sure to reconnect it before you operate the pump.
Air Motor and Throat Service
Refer to FIG. 3 and FIG. 4 for the following instructions.
Pump Repair Kit 238286 is available and includes repair parts for the pump and air motor. Use all parts in the kit for best results.
Two accessory tools should be used: Padded Pliers, 207579, are used to grip the trip rod without damaging its surface; Gauge, 171818, is used to ensure the proper clearance between the poppets and seat of the transfer valve.
Disassembly
1.Flush the pump.
2.Relieve the pressure, see page 6.
3.Disconnect the ground wire from the grounding screw (5a), disconnect the hoses, remove the pump from its mounting, and clamp the air motor base in a vise horizontally by closing the vise jaws on the flange.
4.Use a strap wrench on the fluid cylinder (105) to screw it out of the air motor base (5).
5.Pull the displacement rod (8) down as far as it will go. (FIG. 3)
8 | 306518ZAC |