Sundyne LMV-333, Instruction And Operation Manual

Page: 45 / 67

Step 29
Inspect anti-friction bearing (125C and 125D) for smooth rotation,
worn outside diameter of outer races and snugness of the inner
races on the shafts. Replace if bearings have been in operation
for more than one year, if rotation is not smooth, or if outside or
inside diameters are worn.
CAUTION
It is essential to replace anti-friction bearings with the
manufacturer’s approved replacement bearings. Non-
approved replacement bearings may jeopardize mechanical
integrity of the gearbox/pump.
Anti-friction bearings should be pressed onto the shaft using
a press which contacts only the inner race. Bearing damage
will occur by pressing or pulling the outer race. No more than
0.001 inch (0.03
mm) gap should exist between bearings,
spacers, gears and shaft shoulders. Do not use heat to
assemble bearings to the shaft.
Inspect the inside of the anti-friction bearing liners, see Figure 2
7
.
If a bearing liner inside diameter is more than referenced in Figure
2
7
, replace the gearbox input housing (101B), gearbox output
housing (101A), or bearing plate (102), whichever contains the
worn liner. Bearing liners are not replaceable in the field.
Step 30
If the gearbox or lube system has been contaminated with
particulate matter or process fluid, remove the pressure relief
valve (175), lube jets (174 A, B, C, and D) and flush out the oil
passages. The lube jets are drilled with a .032 inch (0.8128 mm)
diameter hole. Take care not to use Teflon
®
tape downstream
from the oil filter (i.e. oil pressure gauge fitting) because small
pieces of the tape may block the lube jet.
Follow steps in reverse order for reassembly. Refer to pages 51 through 59 for clearance adjustments
Note: Before operating the pump, ensure that the diffuser cavity vent is open.
39