GENERAL PUMP
A member of the Interpump Group
KT24A/28A/30A/32A/36A/40A SERIES
Page 10
Determining the shim pack:
Perform the operation while the piston/con-rod guide units are assembled, the con-rod caps are disconnected
and the con-rods are pushed downwards. Insert the crankshaft in the casing, checking that the PTO shank
comes out from the provided side. Secure the PTO side flange to the casing, taking care with the lip seal as
described previously and tighten the fixing screws to the recommended torque. Then feed the flange on the
indicator side without shims in the case and start to move it closer, manually screwing the M6x40 service
screws in equally, with small rotations such as to move the cover in slowly and correctly.
At the same time, check that the shaft rotates freely by turning it manually.
Continuing the procedure in this way, a sudden increase in difficulty during shaft rotation will soon be
experienced.
At this point, halt the forward movement of the cover and loosen the fixing screws completely.
With the aid of a thickness gauge, measure the clearance between the side cover and pump casing (fig. 4).
Detected
Measurement
Shim
Type
# Pieces
From: 0.05 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
Ref 300943 Rev.A
03-14
Once the type and number of shims have been determined using the table, check the following: assemble the
shim pack on the indicator side cover centring (fig. 15), secure the cover to the casing, following the
procedure in paragraph 2.1.2 and tighten the screws to their recommended torque. Check that the shaft
rotation stall torque is between 3-4.5 Ft. Lbs.(4-6 Nm). If this torque is correct, connect the con-rods to the
crankshaft and to the next stages. If it is not, redefine the shim pack, repeat the operations.
Proceed to detemine the shim pack, using the table below:
