Allison Transmission 3000

a. Install Guide Pins. Guide pins are included in the PTO manufacturers
installation kit. Determine the required position of the guide pins in relation to the
mounted position of the PTO. The guide pins must align with the two blind holes
in the PTO pad. Install two headless guide pins into the converter-housing PTO
pad. Tighten the pins.
b. Install Gasket. Install the special gasket over the guide pins—ribbed surface
away from the transmission.
c. Mount the PTO. Mount the PTO on the guide pins, meshing the PTO driven
gear with the transmission PTO drive gear. Attach the PTO by installing a bolt in
the top bolt hole. Install the remaining bolts. Tighten all bolts to 51–61 N•m
(38–45 lb ft).
4–4. INSTALLING FILL TUBE AND SEAL
a. Location.
• The 3000 Product Family fill tube may be mounted on either the right or
left side. The unused fill tube provision must have a plug to fill the tube
opening.
• The 4000 Product Family fill tube is on the right side.
CAUTION: Install the fill tube bracket with the correct length bolt. A
bolt that is too long may cause cracks and leaks in the main housing.
Refer to the Customer Service section, Table 8–1, for the appropriate
parts catalog for the correct bolt.
b. Installation. Install the fill tube seal into the main housing. Insert the fill tube
through the seal. Align the tube bracket with its bolt location. Install the fill tube
bolt and tighten to 24–29 N•m (18–21 lb ft).
• On all 3000 Product Family transmission models before
S/N 6510107518 install the expansion plug in the unused fill tube hole, if
the plug is reusable. Tighten the plug to 1–2 N•m. (9–18 lb inch).
• On all 3000 Product Family transmission models beginning with
S/N 6510107518, the unused hole is blocked using a fill tube seal and a
new plug. Install the fill tube seal into the unused fill tube hole. Install the
new plug so that the underside of the plug head contacts the fill tube seal.
This plug and seal may be used on earlier units when the expansion plug is
not reusable.
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