Votes - 3, Average rating: 4.3 ( )

Manafacture: Hitachi File size: 308.91 kb File name: Language of manual:

See Fig. 4. 3. Check to see that the air motor piston is at the top of the stroke. If it is not, first read the warning above. Then, while keeping your fingers away from moving parts, apply very low pressure air to the air inlet to move the piston up. Close the air regulator and disconnect the air supply hose. Refer to Fig. 3. 4. Use a 1/4” diameter rod, spanner wrench, or torque wrench to tighten the packing nut. First loosen the nut, then tighten snugly, and finally tighten an additional 1/2 turn (20–25 ft–lbs). See Fig. 5. 5. Replace the muffler cover, and the six screws. See Fig. 4. 6. Reconnect the air line. After the pump is started, it should run at 40 psi (.276 MPa, 2.8 bar) with no load. Startup may require additional air pressure. BASE FLUID OUTLET WEEP HOLE LOCATED OPPOSITE FLUID OUTLET AND IN BOTTOM OF BASE Fig. 3 BASE 20 24 Fig. 4 PACKING NUT 1/4” DIA. ROD Fig. 5 306531 11 Troubleshooting WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8. Relieve the Pressure before you check or service any system equipment. WARNING Never operate the pump with the warning plate (20) or the identification plate (40) removed. These plates protect your fingers from pinching or amputation by moving parts in the air motor. NOTE: Check all other possible problems and solutions before disassembling the pump. Problem Cause Solution Pump fails to operate Low air supply pressure or restricted air lines Increase air supply; clear* Closed valves Open Clogged fluid lines, hoses, valves, etc. Clear* Damaged air motor Service air motor Empty fluid supply container Refill and reprime, or flush Continuous air exhaust Worn or damaged air motor gasket, packing, seal, etc. Service air motor Erratic pump operation Empty fluid supply container Refill and reprime, or flush Held open or worn intake valve or piston packings Clear; service Pump operates, but output is low on the up stroke Held open or worn piston or packings Clear; service Pump operates, but output is low on the down stroke Held open or worn intake valve Clear; service Pump operates, but output is low on both strokes Low air supply pressure or restricted air lines Increase air supply; clear* Closed valves Open Empty fluid supply container Refill and reprime, or flush Clogged fluid lines, hoses, valves, etc. Clear* Packing nut too tight Loosen Loose packing nut or worn packings Tighten; replace *Follow the Pressure Relief Procedure on page 8. Disconnect the fluid hose. If the pump starts when the air is turned on again, the hose or gun is clogged. 12 306531 Air Motor Service Before you start: . Have all necessary parts on hand. Always replace the glands and bearing when replacing the packings. Use all the parts in the repair kits for the best results. See page 18 to order the kits. . Air Motor Repair Kit 206728. Parts included in this kit are marked with a dagger, (for example, 36†), in the text and drawings. . Displacement Pump Repair Kit 206925. Parts included in this kit are marked with one asterisk, (i.e., 6*), in the text and drawings. . Two accessory tools should be ordered. Use Padded Pliers, 207579, to grip the trip rod without damaging its surface. Use Gauge, 171818, to ensure the proper clearance between the poppets and seat of the transfer valve. Air Motor & Throat Disassembly WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8. 1. Flush the pump. 2. Relieve the pressure before proceeding. 3. Disconnect the hoses, remove the pump from its 25 mounting, and clamp the air motor base (55) in a 59 vise. 55 43 4. Use a strap wrench on the riser tube (12) to screw it out of the air motor base (55). 5. Pull the connecting rod (10) down as far as it will go. 6. Use a hammer and punch to remove the roll pin (4). Unscrew the connecting rod (10). See Fig. 6. CAUTION Do not damage the plated surface of the trip rod (54). Damaging the surface of the trip rod can result in erratic air motor operation. Use the special Padded Pliers, Part Number 207579, to grasp the rod. CAUTION To avoid damaging the cylinder wall, lift the cylinder (51) straight up off the piston (59). Never tilt the cylinder as it is being removed. 8. Remove the six screws (25). See Fig. 6. Pull the cylinder (51) straight up off the piston (59). 9. Use a screwdriver to push down on the trip rod yoke (28), and snap the toggles down. See Fig. 7. 51 38 39† 42 44* 1 7. Manually push up on the piston rod (41) to move the piston assembly (59) up as far as it will go. 47 27 54 4* 10 41 49* 50* 48* 2 12 2 Lips of v-packings must face down. 1 See detail below. 04210B Unscrew the cap nut (47). Pull the nut up. Grip the Fig. 6 trip rod (54) with padded pliers, and screw the nut off the rod. See Fig. 6. 306531 13 Air Motor Service M 2 303137 54 28 34† L3 33† 45† 32† 1 59 55 58 53† 33† 45† 1 2 To remove toggles: push in, swing up,...

Download now

Please, enter two numbers from picture: