3500 Engines for Caterpillar Built Generator Sets Caterpillar


Engine Oil Cooler Bypass and Cooling Jet Sequence Valves

Information for equipment:


BASIC ENGINE
PISTON & ROD GP

New Fabricated Tool for Piston Pin Installation {1225} 2003/08/01
Introduction of New Pistons and Remanufactured Cylinder Packs {1214, 1239} 2003/11/01
Some Pistons and Cylinder Packs are Cancelled and Replaced {1214} 2006/06/26
The Piston Pin Retainer Is Now Marked for Correct Orientation {1214} 2004/02/01
A Parts Kit for the Piston Cooling Jets and Retainers for the Piston Cooling Jets is Now Cancelled {1331} 2005/06/20
The Piston Pin Retainer is Now Marked for Correct Orientation {1214} 2004/03/01
A New Piston Pin Retainer is Used {1214} 2004/06/01
Addition to Specifications for "Piston and Rings (One-Piece Piston)" {1214, 1215} 2005/01/31
Tightness of Bolted Joints with the Torque Turn Procedure {1101, 1202, 1203, 1218} 2005/04/11
New Piston and Rod Group {1225} 2006/06/26
New Procedure for Measuring the Connecting Rod {1218, 1225} 2006/08/14
New Piston Assemblies Are Used {1225} 2008/07/14

Install the Correct Piston Cooling Jet and the Correct Retainer for the One-Piece Piston{1214, 1331} Install the Correct Piston Cooling Jet and the Correct Retainer for the One-Piece Piston{1214, 1331}
Piston Ring Gap Alignment Influence on High Blowby and Oil Consumption on All Engines {1000, 1215} Piston Ring Gap Alignment Influence on High Blowby and Oil Consumption on All Engines {1000, 1215}

Do Not Use Unapproved Connecting Rod 7N-2405 Bolts for 3500 and G3500 Engines{1225, 7553} Do Not Use Unapproved Connecting Rod 7N-2405 Bolts for 3500 and G3500 Engines{1225, 7553}
Piston Ring Gap Alignment Influence on High Blowby and Oil Consumption on All Engines {1000, 1215} Piston Ring Gap Alignment Influence on High Blowby and Oil Consumption on All Engines {1000, 1215}




Illustration 1g00277849
Typical example

(1) Clamp bolts

Torque ... 47 ± 9 N·m (35 ± 7 lb ft)

Tightening sequence for the clamp bolts

  1. Snugly tighten the clamp assembly to the tube.

  2. Tighten the clamp assembly to the elbow.

  3. Tighten the clamp assembly to the tube.

(2) Plug

Lubricate the bore lightly with clean engine oil.

Torque ... 100 ± 15 N·m (75 ± 11 lb ft)

(3) 6B-9202 Spring for the cooling jet sequence valve

There is a spring at each end of the block.

Length under test force ... 68.3 mm (2.69 inch)
Test force ... 85 to 100 N (19.0 to 22.4 lb)
Free length after test ... 112.8 mm (4.44 inch)
Outside diameter ... 22.4 mm (0.88 inch)

Both of the cooling jet sequence valves must start to open at the following pressure difference: ... 130 ± 30 kPa (19 ± 4 psi)

Both of the cooling jet sequence valves must be fully open at the following pressure difference: ... 200 ± 30 kPa (29 ± 4 psi)

(4) 2W-1635 Spring for oil cooler bypass valve

Length under test force ... 102.0 mm (4.02 inch)
Test force ... 518 ± 26 N (115 ± 5.8 lb)
Free length after test ... 143.4 mm (5.65 inch)
Outside diameter ... 37.251 mm (1.4666 inch)

The oil cooler bypass valve must open with the following pressure difference: ... 180 ± 20 kPa (26 ± 3 psi)

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