HALE AP, Техническое руководство

Страница: 161 / 177

B-1
APPENDIX B.
TEST EQUIPMENT AND SPECIAL TOOL INFORMATION
B.1. SPECIAL TOOL INFORMATION
Torque Limiting Sockets
A precision torque limiter can be attached to any standard drive tool to provide torque control.
Torque limiters are available in two types: adjustable and preset. Once an adjustable torque lim-
iter is set, the torque limiter prevents the applied force from exceeding the setting. When a pre-
set torque limiter is used, the limiter releases (an audible click is heard) when the preset torque
value is reached.
Torque Wrench
A precision torque wrench is adjustable over a specific torque range and can be attached to any
standard socket or open end wrench tool to provide torque control. Once adjusted and locked
the torque wrench is set, the torque wrench then prevents the applied force from exceeding the
setting. Any torque wrench that adjusts to the torque specified in the procedure can be used. The
required torque is listed for Nm and then shown converted into ft-lb and then in-lb providing a
variety of torque scales. The torque required for use on the booster pump specific component is
listed in each applicable procedure and in general in APPENDIX A and range as follows:
Nm Ft-lb In-lb
169 125 N/A
148 110 N.A
95 70 840
68 50 600
54 40 478
50 37 442
39 28 349
32 24 283
23 17 200
16 12 140
Puller
A puller is primarily utilized to remove the impeller and bearings. The impeller does NOT typically
pull off by hand. If the puller uses legs with claws, the puller requires extra-long legs and very thin
claws as shown on the left-hand picture. This is due to the limited clearance between the volute
and the impeller. Two legs are all that are required to remove the impeller although a three leg
puller will work provided the legs are adequately long with thin jaws. The forcing screw must also
be longer than typical to provide the spread and travel required to pull the large diameter and
deeply recessed impeller.