Fuel Injector Trim Bolt
Usage:
All 3500 and 3600 Families of Engines
A trim bolt is provided on the injectors for the above engines to adjust the rack zero point at the factory. This allen head bolt should NOT be moved, adjusted or tightened in the field. There have been instances where customers have mistaken this allen head bolt for a fastener rather than an adjustment. See illustration.
NOTE: If this trim bolt is moved, the fuel injector must be removed from the engine and completely recalibrated. Low power and an imbalance of fuel going into each cylinder can result. This causes unequal power output from each cylinder.
Location of 5P9653 Bolt in fuel injector rack.
Caterpillar Information System:
1987/06/01 Features And Servicing Of The Various Caterpillar 3161 Governors
1987/05/01 List of Service Publications
1987/05/01 Improved Fuel Priming Pump Used
1987/05/01 Horizontally Mounted Jacket Water Heater Now Used
1987/05/01 Fuel Injection Timing Adjustment
1987/05/01 Alternator/Generator Output Test On The Engine
1987/05/01 Serviceable Parts For New Fuel Ratio Control; Pressurize Control To Set Rack
1987/05/01 The Caterpillar Fuel Flow Monitor System Available
1987/05/01 Testing The Starter On The Engine
1987/05/01 Initial Start Of Engine Using An EGB29P Governor/Actuator After Filling With Oil
1987/05/01 New Service Tools Available
1987/05/01 Service Parts Available For Air-Regulated 8T5190 Wrench Group
1987/06/01 Exhaust Manifold Thermocouples Have Longer Insulated Leads
1987/06/01 Hollow Dowel Relieves Accessory Drive Oil Leakage
1987/06/01 Use Only Paint To Mark Connecting Rod Caps For Torque-Turn Method
1987/06/01 New Plastic Water Sleeve Used
1987/06/01 New Service Tools Available
1987/06/01 Twist Drills Available
1987/06/01 Remanufactured Heavy-Duty Starters And High-Amp Alternators
1987/07/01 New Power Takeoff Groups Used; New System Gives Better Face And Bore Runout On Front Power Takeoff Adapters
1987/07/01 Recommendations For Reusability Of Pistons With Crater Rim Cracks
1987/07/01 Silicone Rubber Water Seals Available
1987/07/01 High Alloy Cylinder Head Improved
1987/07/01 3400 Engine Major Component Performance Guide Available