General Pump HF Owner Manual - Manual (Page 14)

GENERAL PUMP
A member of the Interpump Group
HF SERIES
Page 14
11.1.4 Disassembling / reassembling of the crankshaft
with replacement of the bearings
After disassembling the side covers, as indicated in point
11.1.1, remove the outer ring nut of the bearings from
their covers and the inner ring nut, together with the
remaining part of the bearing, from the 2 shaft ends by
means of a standard pin extractor or similar tool. See Fig.
15-16.
The new roller bearings can be mounted at room temp-
erature with a press; it is necessary to hold them on the
side surface of the ring nuts with suitable rings. The
driving operation can be facilitated by heating the parts at
a temperature between (250 o - 300 o F) making sure that
the ring nuts are fitted in their seats.
NOTE: Take care not to invert the components of the 2
bearings (outer ring nut of bearing 1 instead of the one of
bearing 2...).
To maintain the right axial load, the shim package has to
be calculated again as follows:
A) Install the crankshaft into the crankcase making sure
that the PTO end comes out on the correct side.
B) Fit the motor side flange on the crankcase with
special attention to the seal lip as indicated on point
11.1.2.
C) Position the sight glass side flange using the 3
screws M6 x 18 until the crankshaft cannot be
turned by hand freely.
D) By means of a thickness gauge (see Fig. 11)
determine the shim package as indicated in the
table below.
E) Fit the shims under the sight glass side cover,
tightening it on the crankcase with the screws and
check that the stall torque is between 4 Nm and
6Nm.
F) If the torque is correct, connect the rods to the
crankshaft, otherwise, calculate the shims again as
per point “C”.
Measure Shim Type # Pieces
From: 0.5 to 0.10
From: 0.11 to 0.20
0.1 1
From: 0.21 to 0.30 0.1 2
From: 0.31 to 0.35 0.25 1
From: 0.36 to 0.45 0.35 1
From: 0.46 to 0.55
0.35
0.10
1
1
From: 0.56 to 0.60 0.25 2
From: 0.61 to 0.70
0.35
0.25
1
1