Series 50 – Section 9.2 Front Mounted Power Take-Off

Section 9.2
Front Mounted Power Take-Off

Detroit Diesel Corporation (DDC) has a front mounted PTO for use on the Series 50 engines. See Figure "Front Mounted Power Take-off Components" . ‪

Figure 1. Front Mounted Power Take-off Components

This PTO is available in two different models, adaptable to Spicer 1310 and Spicer 1350 drive shafts depending on the torque and horsepower requirements. Maximum torque and horsepower for the PTO assemblies are listed in Table "Torque and Horsepower for the Front Mounted Power Take-off Assemblies" .‪

Note: These torque and horsepower values are the maximum available taken at three degrees shaft angle. Any increase in the shaft angle has a direct negative effect on the amount of available torque and horsepower, as well as shaft life.

Also, any new application must have a "Torsional Analysis" performed by the DDC Engineering Department. ‪

The PTO drive shaft must be purchased through Spicer Universal Joint Division, Dana Corporation.‪

If a PTO adaptor kit is to be installed on an engine that has been in service it will be necessary to remove the standard pulley configuration and replace it with one of the PTO adaptor kits.‪

Perform the following steps to install the new PTO assembly:‪

1. Remove the six bolts that retain the standard crankshaft pulley; refer to "1.13 Crankshaft Pulley" .
2. Install the new PTO pulley; refer to "9.2.3 Installation of the Front Mounted Power Take-off" . Be certain to use the new bolts and washer provided with the PTO adaptor kit.
3. Install the new hub insulator assembly inside the new pulley assembly making certain that the slot on the backside of the hub fits over the dowel in the pulley.
4. Install the new 1 in.-14 x 3.50 in. bolt and retainer after coating the bolt threads and underside of the bolt head with INTERNATIONAL COMPOUND #2®. Torque the bolt to 610 N·m (450 lb·ft).

Section 9.2.1
Repair and Replacement of the Front Mounted Power Take-off Assembly

The front mounted power take-off assembly is a nonserviceable component, tag for remanufacture.‪

Section 9.2.2
Removal of the Front Mounted Power Take-off

Perform the following steps to remove the PTO assembly:‪

1. Remove the inspection plug in the bottom of the flywheel housing and install the flywheel lock tool, J 36375–A . See Figure "Flywheel Lock" .
   

   Figure 2. Flywheel Lock

2. Thread the center screw of the flywheel lock, J 36375–A , into the flywheel housing until the tip of the tool rests between two teeth of the flywheel ring gear. Tighten the knurled knob finger-tight. See Figure "Flywheel Lock" .

   Note: It may be necessary to bar the engine over so that the tool center screw is exactly between two teeth.

3. Remove the PTO hub assembly attaching bolt and retainer.
4. Remove the PTO hub assembly.
5. Remove the crankshaft pulley. Refer to "1.13.2 Removal and Cleaning Crankshaft Pulley" .

Section 9.2.2.1
Inspection of the Front Mounted Power Take-off

Visually inspect the PTO hub contact surfaces for galling or burrs. To correct surfaces that have damage, smooth these surfaces with emery cloth or a stone.‪

Section 9.2.3
Installation of the Front Mounted Power Take-off

Install the PTO assembly as follows:‪

1. If removed, install flywheel locking tool J 36375–A through the inspection plug hole in the bottom of the flywheel housing. See Figure "Flywheel Lock" .
2. Install the crankshaft pulley. Refer to "1.13.3 Installation of Crankshaft Pulley" .
3. Install the PTO hub assembly inside of the crankshaft pulley making sure the slot on the backside of the hub fits over the dowel in the pulley.
4. Install the PTO hub assembly attaching bolt and retainer after coating the bolts threads and underside of the bolt head with INTERNATIONAL COMPOUND #2® or equivalent. Torque the bolt to 610 N·m (450 lb·ft).