Sherwood Pump Catalog

39 17000 Series Technical Guide Assembly/Disassembly Instructions T ECH GU I DES 15 13 11 6 5 3 2 1 4 24 23 25 20 16 10 12 19 21 18 14 10 7 8 9 The following assembly/disassembly procedures apply to all 17000 Series pumps. Deviations from pump to pump are primarily a result of different methods of drive and mounting. Pump model numbers can be found stamped into the cover plate of the pump. Disassembly: A. Remove the three bolts (1) and lock washers (2) from the pump cover (3). The cover and o-ring (4) are now free. The impeller end cap (5) can be pried off with a screwdriver. Normally, impellers (7) can be removed by using the 23631 or 25105 impeller puller (3/4” – 16 bolt) for the 17000 threaded impeller or by using two pair of pliers to grip two of the impeller’s vanes on opposite sides of the impeller. A penetrating lubricant will help loosen a stuck impeller. Also, rotating the shaft by hand may help free the impeller. The 3/16” key (6) will also be removed at this time. B. Remove any pulleys or drive gears (25) from the drive shaft. For tapered shaft models (all models except P173 and P1719), it is necessary to remove the shaft nut and pull the gear or pulley with a puller. For models with pressed on gears (P173), two threaded holes are provided in the gear. An appropriate puller may be attached to these two holes to remove the gear from the shaft. C. Most models will be equipped with a flange adapter (24). The flange adapter is held to the pump body by two socket head cap screws (21), either 3/8” or 10mm, depending on the model. The screws are removed by using a hex socket wrench. More current models are mounted with four 8mm flange hex head bolts. The adapter is then removed. If the lip seal (23) in the adapter requires replacing, it can be pressed out at this time. D. The cam (8) and cam screw (9) are removed. The internal wear plate (13) will drop out. The retaining ring (10), washer (11) and seal seat (14) are then removed. Pump models P1710C, P1716C, P1722C, P1727C, P1730C, P1732C, and P17XX-04 do not utilize this retaining ring and washer. For these pumps, the seal seat can be removed in step F below. E. From the ball bearing end, the internal snap ring (17) must be removed on models P171 through P176, P1710 and P1732. All other models have extended bearing assemblies and are held together by means of the flanged adapter. F. The shaft/bearing assembly (19) is pressed out of the body from the impeller end of the housing and removed from the engine end of the pump. For pump models P1710C, P1716C, P1722C, P1727C, P1730C, P1732C, and P17XX-04, the seal seat will press off of the shaft when the shaft is forced out of the pump. G. On earlier models, the two external snap rings (10) are removed from the shaft (19) along with the bearing washers (12), permitting removal of bearings (20). More recent designs do not utilize the bearing washers, and they have one retaining ring in-between the ball bearings. The mechanical seal (15) may now be removed by pressing it out from the bearing side of the housing (18). Warning: If a shaft/bearing assembly exists for the particular model that is being repaired, do not try to build the shaft/bearing assembly from the individual parts, but instead purchase the entire assembly. Due to extremely tight tolerances, special assembly procedures for this assembly must be followed to prevent galling and subsequent leakage in the oil seal area of the pump. Reassembly: A. Press mechanical seal (15) into housing (18), using the seal pusher provided in the 25115 seal kit if applicable, with the grey silicon carbide or black carbon seal face toward the impeller. B. On all older model pumps with mounting adapters, the lip seal (23) will have to be replaced prior to replacing the flange adapter (24). Care should be taken to ensure proper alignment of the lip seal to the adapter and that the lip seal is uniformly pressed to prevent distortion. The metal backing ring of the lip seal goes toward the pump and away from the engine. C. Skip this step if the entire shaft/bearing assembly is available for the particular model that is being repaired. Install external snap ring (10) on shaft (19). Next, place washer (12), bearing (20), bearing spacer (16), second bearing (20) and washer (12) and secure with the second external snap ring (10). The bearings will have to be pressed on from the pulley/gear end. Note that it is extremely important to properly align the bearings to the shaft prior to the press, otherwise the possibility exists of galling the shaft in the area of the lip seal.