Manual

Maintenance
Pure oil-mist lubricated power ends are assembled in the same manner as ring oil-lubricated
power ends. Oil rings are not furnished with pure oil-mist lubrication. Disregard any reference to
those parts.
1. Install the radial (inboard) bearing on the shaft.
112 Duplex thrust bearing
114 Oil rings
122 Shaft
136 Thrust-bearing locknut
168 Radial bearing
382 Lockwasher
2. Install the oil rings and bearings:
a) Install the oil rings on the shaft.
Pump type Oil rings
SX, MX, LA, LX, XLA, and XLX 2
SA and MA 1
b) Install the thrust (outboard) bearings on the shaft.
c) Place the bearing lockwasher on the shaft and the tang of the lockwasher in the
keyway.
d) Thread the bearing locknut onto the shaft.
After the bearings and the shaft have cooled to the ambient temperature, tighten the
locknut to the torque values shown in the Maximum torque values for 3700 fasteners
table.
e) Bend a tang of the bearing lockwasher into a slot of the locknut.
82 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual