Installation Of A Split Shaft; Application Data - Parker 732 Series Owner's Manual

Bulletin HY25-1900-M1/US
Installation of Split Shaft
Application Data for Installation of a Split Shaft
Split Shaft Through Torque Ratings
The torque capacity of the Chelsea Split Shaft units is limited by either the engine capacity or the vehicle wheel
skid conditions. To correctly choose a split shaft model for a given application, the maximum torque from the
engine, and the maximum torque due to wheel conditions, should be calculated. The limiting value obtained by
these calculations should then be compared with the charted split shaft torque capacity.
Formula
Maximum Through Torque From the Engine
1. Maximum Torque From the Engine = Maximum Net Engine Torque X Manual Transmission Low Gear Ratio X
85% Efficiency
2. For an automatic transmission, the maximum torque from the engine should be taken from the engine-
transmission performance curve stall torque value. This information is generally available from the
manufacturer of the automatic transmission.
Maximum Torque Due to Wheel Skid Conditions
3. Maximum Lbs-ft of Torque = GVW x f x RAD
Where: GVW = maximum gross vehicle weight on the rear wheels only
f = coefficient of friction
RAD = tire loaded rolling radius (inches)
AR = axle ratio
Based on past experience, the coefficients of friction used have been:
f = 0.8 for on-highway service (dry pavement)
f = 0.5 for off-highway service
These are generally used values but if information is available for a specific application, the appropriate coefficient
of friction can be used.
Split Shaft Through Torque Capacity
Split Shaft
Shaft Outside
Model Diameter
931 1-3/8"
Service Factor Chart
Duty
Extra Light
Light
Heavy
Extra Heavy
The allowable split shaft torque can be calculated using the above charted values and the following equation:
Allowable Split Shaft Torque =
Owner's Manual
Legacy Split Shafts and Gear Box
12 x AR
Maximum Nominal Torque Rating (Lbs-ft)
Diesel Engine
Automatic Manual
Transmission Transmission
1,700 1,600
Vehicle Description
Light Vehicle on Highway
Light Vehicle off Highway
Heavy Vehicle on Highway
Heavy Vehicle off Highway
Maximum Nominal Torque Rating
Application Service Factor
8
Gas Engine
Automatic Manual
Transmission Transmission
2,200 2,200
Service Factor
1.0
1.1
1.2
1.3
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA