MOTOR AS-GOV 2277658 - Caterpillar

Table 1
Engine 3.0L 5.0L/5.7L 8.8L/8.8L Turbo
Type 3.0L L4 5.7L V-8 GEN-1E 8.8L V-8
Displacement cc
(c.i.d.) 2966 (181) 5735 (350) 8800 (537)
Compression Ratio 10.5:1 9.4:1 10:1
Valve Configuration Push Rod Actuated Overhead Valve Push Rod Actuated Overhead Valve Push Rod Actuated Overhead Valve
Valve Lifters Flat Follower Hydraulic Roller Hydraulic Roller
Bore x Stroke mm
(inches) 101.60x91.44
(4.00x3.60) 101.60x88.39
(4.00x3.48) 110.49x114.30
(4.35x4.50)
Main Bearing Caps 2 Bolt 2 Bolt 4 Bolt
Firing Order 1–3–4–2 1–8–4–3–6–5–7–2 1–8–7–2–6–5–4–3
Minimum Oil Pressure (Hot) 6 psi at 1000 rpm
18 psi at 2000 rpm 6 psi at 1000 rpm
18 psi at 2000 rpm 5 psi at 1000 rpm
15 psi at 2000 rpm
Engine Rotation
(Flywheel End) CCW CCW CCW
Ignition System High Voltage Switch (HVS) High Voltage Switch (HVS) Distributor-less Electronic (ECU)
Ignition Timing ECM Controlled
Not Adjustable ECM Controlled
Not Adjustable ECM Controlled
Not Adjustable
Spark Plug Gap 0.035 in 0.035 in
Valve Clearance (Lash)
Intake
Exhaust Half to 1 Turn Down From 0 Lash 1 Turn Down From 0 Lash Net Lash
No Adjustment Gas Package Operating Pressures for Natural Gas
Table 2
Model Standard Gas Train Optional Upgrade Gas Train
Minimum Operating Pressure Maximum Operating Pressure Minimum Operating Pressure Maximum Operating Pressure
in H2O kPa in H2O kPa in H2O kPa in H2O kPa
DG30–2 9.5 2.4 27.7 6.9 8.0 2.0 27.7 6.9
DG50–2 8.0 2.0 27.7 6.9 Not Available Not Available
DG60–2 8.0 2.0 27.7 6.9 Not Available Not Available
DG80–2 8.5 2.1 27.7 6.9 Not Available Not Available
DG100–2 10.0 2.5 27.7 6.9 Not Available Not Available
DG125–2 10.0 2.5 27.7 6.9 8.0 2.0 27.7 6.9
DG150–2 10.5 2.6 27.7 6.9 8.5 2.1 27.7 6.9 Gas Package Operating Pressures for LP Vapor
Table 3
Model Standard Gas Train Optional Upgrade Gas Train
Minimum Operating Pressure Maximum Operating Pressure Minimum Operating Pressure Maximum Operating Pressure
in H2O kPa in H2O kPa in H2O kPa in H2O kPa
DG30–2 8.5 2.1 27.7 6.9 8.0 2.0 27.7 6.9
DG50–2 8.0 2.0 27.7 6.9 Not Available Not Available
DG60–2 8.0 2.0 27.7 6.9 Not Available Not Available
DG80–2 Not Available Not Available Not Available Not Available
DG100–2 10.0 2.2 27.7 6.9 Not Available Not Available
DG125–2 Not Available Not Available Not Available Not Available
DG150–2 8.5 2.1 27.7 6.9 8.0 2.0 27.7 6.9 Ignition Systems
Types of Ignition Systems
Your engine uses one of two types of ignition systems. 1) Distributor-less electronic ignition and 2) High Voltage Switch (HVS) ignition. Both types of ignition are controlled by the engine ECU. Distributor-less electronic ignition is utilized on the 8.8L e