Service Repair Manual
312C and 312C L Excavator
Model: 312C EXCAVATOR DBN
Configuration: 312C & 312C L Excavators DBN00001-UP (MACHINE) POWERED BY 3064 Engine
Disassembly and Assembly
3064 and 3066 Engines for Caterpillar Built Machines
Media Number -SENR5553-10
Publication Date -01/05/2012
Date Updated -15/05/2012
Fuel Injection Pump - Remove
SMCS - 1251-011
Universal Metric Socket Set
Universal Metric Socket (1)
( 1 ) Part of the Universal Metric Socket Set
A. Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines
- Remove and Install".
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
312C & 312C L Excavators DBN00001-UP (MACHINE) POWERED BY 3064 Engin...
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
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 mandates.
1. Ensure that the engine is the top center position on number one piston. Refer to Testing and
Adjusting, "Finding Center Position for No. 1 Piston".
2. Remove bolts (1) and washers that secure the cover (2) to the engine front housing.
3. Remove the access cover. Note the timing marks on the fuel injection pump drive gear and
the idler gear for later installation.
312C & 312C L Excav