Usage:
3208 Industrial Engines ( 90N, 3Z ) Used In Sperry-New Holland Combines
- SUPPLEMENT: 11/18/85
SERVICE MAGAZINE, APRIL 8, 1985, PAGE 14, "New Outer Governor Spring And Torque Control Pin Used In Governor And Pump Groups." The Governor Spring Identification chart is incorrect. The 4N5659 Governor Spring has one pink stripe AND one white stripe.
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Description of Change: A new outer governor spring and a new torque control pin assembly are used in all governor pump groups on 3208 Industrial Engines installed on Sperry-New Holland Combines. See the illustration. The spring rate of the new governor springs is less than the rate of the former springs. With the new spring, the engine can develop full rated horsepower with less rpm drop. This helps to maintain the desired combine rotor speed when variable field conditions are encountered.
The new torque control pin assembly replaces the former load stop pin. It uses a coil-type torque spring design, which provides an improved torque rise as the engine lugs below full load rpm. This will reduce the number of adjustments to travel speed that are required as the combine encounters variable field conditions.
The new torque spring will have no effect while the engine is operating above full load rpm.
Adaptable To: The new outer governor spring and torque control pin assembly are direct replacements for the former parts as shown in the following chart. The new parts are also directly adaptable to all earlier 3208 Industrial Engines used in Sperry-New Holland Combines.
Use the following procedure to install the new parts. Refer to the illustration.
Outer Governor Spring Installation
1. Identify which governor spring you have, using the following color codes.
2. Remove the governor housing from the engine. Refer to the appropriate Service Manual for 3208 Engines to do this. On turbocharged engines, it is necessary to remove the intake manifold to gain access to the governor.
3. Remove the former outer governor spring and install the new outer governor spring.
4. Remove the load stop cover.
5. Slightly loosen the two screws that hold the 8N2901 Fuel Temperature Compensator Group in place.
6. Use a 3/16" hex wrench to loosen screw (A). Remove screw (A). Use a 1/4", 12 point box-end wrench with a maximum thickness of .170" to loosen screw (B). Do not remove screw (B). Position the fuel temperature compensator group so the former load stop pin can be removed.
7. Remove the former load stop pin and install the new 4W9007 Torque Control Pin Assembly. Make sure the spring is in the up position as shown in the illustration.
8. Turn the temperature compensator back to its original position. Install screw (A). Tighten screw (A) and screw (B) to 12 ± 4 N·m (9 ± 3 lb ft).
9. Install the governor housing on the engine. Check and adjust the fuel setting, using the specifications shown on the Engine Information Plate.
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The factory-adjusted high idle rpm (shown on the Engine Information Plate) must be maintained. Therefore, the rated horsepower will occur at a slightly higher rpm when the new governor spring is installed.
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Location of new parts in governor and fuel pump group.