LUBRICATOR GP-AIR MOTOR 4N7556 - Caterpillar

3508 (95Y, 68Z) Industrial, 3508 (96Y, 69Z) Marine, 3508 (1ZF, 23Z, 70Z) Generator Set, 3508 (6TJ) Locomotive, 3508 (97Y) Vehicular Engines;
3512 (1LM, 49Y, 65Z) Industrial, 3512 (50Y, 66Z) Marine, 3512 (3YF, 24Z, 67Z) Generator Set, 3512 (2WK) Locomotive, 3512 (51Y) Vehicular Engines;
3516 (27Z, 71Z) Industrial, 3516 (4MJ, 29Z, 72Z) Marine, 3516 (4XF, 5SJ, 25Z, 73Z) Generator Set, 3516 (9KF) Locomotive, 3516 (28Z) Vehicular Engines;
G3508 (4WD, 2JF, 9TG, 9AW),
G3512 (4KC, 5JD, 7NJ, 6JW),
G3516 (3RC, 8LD, 4EK, 5PN, 8PW) EnginesSUPPLEMENT: JUNE 1998Engine News SEBD9255, Article 5, Page 4, December 1997; "New Basic Governor Groups (Woodward 3161) Have Self-Contained Oil Supply".The subtitle and the first sentence of the Description Of Change of this article are not complete. The complete subtitle and first sentence of the Description Of Change follow:3508 (95Y, 68Z) Industrial,3508 (96Y, 69Z) Marine3508 (1ZF, 23Z, 70Z) Generator Set,3508 (6TJ) Locomotive,3508 (97Y) Vehicular Engines; 3512 (1LM, 49Y, 65Z) Industrial, 3512 (50Y, 66Z) Marine3512 (3YF, 24Z, 67Z) Generator Set,3512 (2WK) Locomotive,3512 (51Y) Vehicular Engines;3516 (27Z, 71Z) Industrial, 3516 (4MJ, 29Z, 72Z) Marine,3516 (4XF, 5SJ, 25Z, 73Z) Generator Set,3516 (9ZF) Locomotive,3516 (28Z) Vehicular Engines;G3508 (4WD, 2JF, 9TG, 9AW), G3512 (4KC, 5JD, 7NJ, 6JW), G3516 (3RC, 8LD, 4EK, 5PN, 8PW) Engines
Description of Change: New basic governor groups (Woodward 3161) are used on these 3500 and G3500 commercial engines.--------------- END SUPPLEMENT ---------------Description of Change: New basic governor groups (Woodward 3161) are used on these 3500 commercial engines. These new 3161 Governors have a self-contained oil supply. The former 3161 Governors were connected into the engine's oil system. This could allow engine contaminants to collect inside the governor cavity. These contaminants could shorten the governor service life. The use of a self-contained oil supply should result in increased governor service life. Physically, the vented oil fill cap (1), sight gauge (2), and oil drain plug (3) distinguish the new self-contained 3161 Governors from the former 3161 Governors.
Typical New (Self-contained) 3161 Governor. Vented Oil Fill Cap (1).Sight Gauge (2). Oil Drain Plug (3). Adaptable To: The chart identifies the new and corresponding former 3161 Governors. The new governors are direct replacement for the former governors. The former governors have been canceled. The rework of former 3161 Governors to self-contained governors is not recommenced. New (Self-contained) 3161 Governor Lubrication.
The new 3161 Governor uses synthetic oil (API CF-4 SAE 5W-40 full synthetic). This oil has superior lubricating properties for a wide range of operating temperatures. Because it is a synthetic oil and not subject to oxidation, no oil changes are required for the life of the governor. If filling the governor is required, 136-9642 Governor Oil is recommended.
The customer does have the option to drain the synthetic oil and refill with a petroleum or alternate synthetic oil specific to that engine's application. Petroleum oil may be favorable in marine applications where only one type of lubricant is available for the engine. Care must be taken to ensure that the oil that is used can operate in the range of temperatures that the engine is exposed to.