Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
Care must be taken to ensure that fluids are contained
during performance of Inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component containing
Refer to Special Publication, NENG2500, "Caterpillar Tools
and Shop Products Guide" for tools and supplies suitable
to collect and contain fluids on Caterpillar products.
Dispose of all fluids according to local regulations and
Remove bolt (2) and two bolts (1) that hold the oil
pressure relief valve in position.
Remove the oil pressure relief valve in order to gain
access to the connecting rods.
Remove two bolts (4) and bolt (3). Remove the oil
Remove the oil strainer in order to gain access to the
In order to remove the connecting rod caps, turn the
crankshaft in a clockwise direction until the piston is at
the bottom center position.
Type A connecting rod.
Type B connecting rod.
There are two types of connecting rods that may
be used in the engine. Type A connecting rods
have serrated mating faces on the connecting rod
and the connecting rod cap. Type A connecting
rods are held together with a through bolt and a
nut. Type B connecting rods have an alignment
pin in the connecting rod cap. Type B connecting
rods are held together with a bolt that is threaded
into the connecting rod.
If you have Type A connecting rods, remove two nuts
(9) and two bolts (10). If you have Type B connecting
rods, remove two bolts (11).
Remove connecting rod cap (8) from the connecting
Remove lower connecting rod bearing (5). Keep the
connecting rod bearings together with the respective
connecting rod caps for installation purposes.