2
GENERAL INFORMATION
The Hydra-Drive is a gearbox designed to make it possible to put a variable displacement pump
on a Ford 4 x 4 truck with the TorqShift 6 transmission. The gear box attaches to a Chelsea 249
PTO
output lowering it 8” and converting the output to a SAE
-B 2 bolt. The Hydra-Drive is a 1:1
gearbox so the PTO ratio of 124% is not changed. The direction of rotation does change from
opposite engine to engine rotation. The pump rotation needed is clockwise rotation.
IMPORTANT:
Read this manual before proceeding in the installation of the Hydra-Drive.
DIMENSIONS
SPECIFICATIONS
Ratio: 1:1
Input: SAE-A pilot with a SAE-B 7/8-13 tooth shaft
Output: SAE-B pilot with a SAE-B 7/8-13 tooth spline
Output Rotation: Engine (Clockwise pump rotation needed)
PTO required: Chelsea #249 FMLLX-B4XP (124% ratio)
Summary of Contents for Hydra-Gen HU507-GB12
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