1996/02/12 Caterpillar


Closed Engine Crankcase Breather System Maintenance And Repair {1317,1107}

Usage:

Information for equipment:


BASIC ENGINE
VALVE MECHANISM GP

Set Engine Valve Lash After Installing All Remanufactured Long Blocks {1102, 1121, 1123, 1209} 2012/10/08

Set Engine Valve Lash After Installing All Remanufactured Long Blocks {1102, 1121, 1123, 1209} 2012/10/08

Additional Holes In Cylinder Head Gasket Additional Holes In Cylinder Head Gasket

Rocker Shaft 3054 Engine
Valve Mechanism Cover 3054 Engine

9U-5132 Timing and Fuel System Setting Tool Group{1105, 1162, 1290, 1905} 9U-5132 Timing and Fuel System Setting Tool Group{1105, 1162, 1290, 1905}
Operating Instructions for 155-1536 Valve Recession Tool Kit for all G3500 and 3500 Engines{0374, 0599, 0701, 0703, 0759, 0767} Operating Instructions for 155-1536 Valve Recession Tool Kit for all G3500 and 3500 Engines{0374, 0599, 0701, 0703, 0759, 0767}
Operating Instructions for 148-2997 Valve Recession Tool Group Used On 3600, G3600, and C175 Engines{0374, 0599, 0701, 0703, 0759} Operating Instructions for 148-2997 Valve Recession Tool Group Used On 3600, G3600, and C175 Engines{0374, 0599, 0701, 0703, 0759}
CRB Valve Spring Testers 8S-2263 and 4C-9496{0374, 0599, 0700, 0701, 1108} CRB Valve Spring Testers 8S-2263 and 4C-9496{0374, 0599, 0700, 0701, 1108}

Reuse & Salvage for Valvetrain Components {1102, 1108, 1109, 1121, 1123} Reuse & Salvage for Valvetrain Components {1102, 1108, 1109, 1121, 1123}
9U-5132 Timing and Fuel System Setting Tool Group{1105, 1162, 1290, 1905} 9U-5132 Timing and Fuel System Setting Tool Group{1105, 1162, 1290, 1905}

Finding Top Center Position for No. 1 Piston 3054 Engine
Engine Valve Lash - Inspect/Adjust 3054 Engine
Valve Depth - Inspect 3054 Engine
Valve Guide - Inspect 3054 Engine

Valve Mechanism Cover - Remove and Install 3054 Engine for Caterpillar Built Machines
Rocker Shaft and Pushrod - Remove 3054 Engine for Caterpillar Built Machines
Rocker Shaft - Disassemble 3054 Engine for Caterpillar Built Machines
Rocker Shaft - Assemble 3054 Engine for Caterpillar Built Machines
Lifter Group - Remove and Install 3054 Engine for Caterpillar Built Machines
Rocker Shaft and Pushrod - Install 3054 Engine for Caterpillar Built Machines

Closed Engine Crankcase Breather System Maintenance And Repair {1317,1107} 1996/02/12
New Engine Valve Cover Gasket Helps Prevent Oil Leaks{1107} 1996/04/15
New Valve Cover Used On 3054 Engines {1107} 1999/03/22
Maintenance and Repair to a Closed Loop System for the Engine Crankcase Breather {1107, 1317} 2000/03/27
A New Valve Cover Gasket is Now Used on 3054 and 3056 Machine Engines {1107} 2001/04/23
Clarification of Service Interval for Setting Engine Valve Lash {1102} 2002/03/18
Set Engine Valve Lash After Installing All Remanufactured Long Blocks {1102, 1121, 1123, 1209} 2012/10/08



914G (7ZM, 9WM) Wheel Loaders;
IT14G (8ZM, 1WN) Integrated Toolcarriers;
M312 (6TL),
M315 (7ML) Excavators;
PF-300B (6HM),
PS-300B (4PN) Compactors

Some of the 3054 Machine Engines in these machines are equipped with a closed breather system. The breather removes the combustion gases from the engine crankcase and directs the gases to the induction system.

An internal port in the rocker cover allows the crankcase gases to pass into the breather body through a foam filter (3). Then the gases flow through a series of baffle plates (6) and into the valve cover through holes at the bottom of the chamber for the baffles. A valve (1) controls the flow of gases which pass from the breather, through the plastic outlet elbow (4), to the intake manifold.

The valve cover and breather assembly are made of a composite material and should be removed and installed with care. The 3054 breather uses three baffle plates (6).

The chart and illustration identify the breather system components.


Identification of closed breather system components.

Maintaining the Engine Breather System

Disassembly

You must read and understand the warning and instructions contained in the Safety section of the Operation And Maintenance Manual, before performing any operation or maintenance procedures.


NOTICE

Do not use excessive force to remove the hose from the breather outlet elbow. If the elbow breaks away from the breather body, see Procedure To Repair The Connection For The Breather Outlet Elbow.


1. Release the hose clamp and CAREFULLY remove the hose from the breather elbow (4).

2. Remove the valve cover. (See the Service Manual)

NOTE: Use care not to damage the breather cover or breather body with a pry bar.

3. Remove the bolts and carefully remove the breather cover from the breather body. It may be necessary to use a suitable pry bar to remove the cover from the body of the breather. Be sure that the pry bar does not damage the cover or body. Remove and discard the gasket (5).

NOTE: The breather valve (1) should be replaced every 4000 hours of operation. The foam filter (3) should be replaced every 2000 hours of operation.

4. Release the clip retainers (2) on the breather valve (1) and push the valve out of the breather cover.

5. Remove and discard the foam filter (3).


NOTICE

To prevent damage to the breather valve, remove the valve before the cover is washed.



NOTICE

Ensure that all the cleaning fluid is removed before the breather is assembled.


6. Use a clean nonflammable solvent to wash the body of the breather, the cover, baffle plates (6), and the breather elbow every 2000 hours of operation. Thoroughly dry the components after cleaning.

7. Ensure that the holes in the bottom of the chamber for the baffle plates are not restricted. If necessary, clean the holes.

Assembly

1. Install the baffle plates (6) into the grooves in the breather body.

2. Install a new foam filter (3) into the breather body.

3. Install a new valve (1) into the breather cover. Ensure that the clips (2) are engaged correctly.

4. Install a new gasket (5). The gasket is installed dry. Put the cover and valve assembly into position on the breather body. Loosely install the bolts. Tighten the bolts gradually and evenly to a torque of 3 N·m (27 lb in).


NOTICE

Do not use excessive force to fit the hose to the breather outlet elbow.


5. Check to be sure there is no restriction in the breather elbow or the breather hose. Carefully install the breather hose on the breather elbow (4). Tighten the hose clamps that fasten the hose to the elbow.

Procedure To Repair The Connection For The Breather Outlet Elbow


NOTICE

Thoroughly clean the inside of the breather body after it has been drilled.


1. Ensure that the breather body is secure. Use a 22.5 mm (.89 in) drill to drill to a depth of 10.0 mm (.39 in) to remove the broken connection of the outlet elbow. Thoroughly clean the inside of the breather body.

2. Thoroughly clean the contact faces of the elbow and the breather cover.

3. Replace the breather elbow (4). Ensure that the contact surface of the elbow connection has a rough finish. Put the elbow into position on the breather body.

4. Apply Permabond® E3524 adhesive (in accordance with the manufacturers instructions) to secure the elbow to the breather body.

Caterpillar Information System:

1996/02/12 New Components Used In Governor And Fuel Pump Drive Group{1288}
1996/02/05 Lubricant Used On Cylinder Head Bolts Changed{1100}
1996/02/05 Fuel Injector Sleeve Replacement Tooling{0703,1125}
1996/01/22 Governor Spring Guide Press Depth{1287,1284}
1996/01/22 Tamper Resistant Plugs And Tamper Resistant Bolts Used To Prevent Changes To Fuel Ratio Control (FRC) Setting{1278,1287}
1996/01/22 New Valve Cover Gasket{1107}
1996/01/22 Fuel System Component Information{1254}
1996/01/22 Mixing Caterpillar Long Life Coolant/Antifreeze (LLCA) With Conventional Cat Diesel Engine Antifreeze/Coolant And/Or Other Commercially Available Diesel Engine Antifreeze/Coolants Is Not Recommended{1395}
1996/01/22 Caterpillar Electronic Technician (CAT ET){0700}
1996/01/08 Lockout Device Now Available For The Battery Disconnect Switch{1411}
1996/01/08 Key Start Switch Improved{1416}
1995/12/25 New Valve Guide Available{1104}
1996/02/19 New Material Used In O-Rings And Optional New Block Side Cover Replacement{1201}
1996/02/26 New Engine Cylinder Head Injector Sleeve Used In Both Mechanical Unit Injection (MUI) And Hydraulic Electronic Unit Injection (HEUI) Engines{1125}
1996/03/11 New Drum Support Gearbox Used To Improve Service Life{4053}
1996/03/11 Speed Sensor Group Contains New Gear Mesh Adjuster Parts For Feet Per Minute Encoder{7495}
1996/03/11 Working Load Limits For Forcing Screws, Puller Bolts and Studs{0700}
1996/03/18 Special Instruction SEHS9824 Available For Cab Window Service Procedure {7310}
1996/03/18 Hose Cleaner Group And Tool Operating Manual Is Available {0600,5057}
1996/03/18 Parts Manual Fuel Filter Lines Group Illustration Corrections {1262}
1996/03/25 Possible Sources of High Crankcase Blowby From Breather Tube{1317}
1996/03/25 Fuel Injection Pump Barrel Sealing Face Reconditioning{1251}
1996/04/01 Vibratory And Propel Control Cables Improved {3209}
1996/04/01 New Programmable Logic Control With In-Phase Monitor For Contactor Type Automatic Transfer Switches {4469}
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