Bulletin HY25-1135-M1/US
Owner’s Manual
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
13
General Installation
6 and 8-Bolt PTOs
Installing Rotatable Flanges
The rotatable flange is shipped loose with the PTO units for ease of installation. After determining the
flange position, attach the flange to the PTO bearing cap using the capscrews provided in the bag kit.
After installing the capscrews make sure to torque the screws to the proper specifications
(See chart below).
Consideration should be taken on the size and weight of the pump being installed (See page 4).
RA Flange Shown
NOTE: Reinstalling or tightening of a rotatable flange after it has become loose is not recommended.
If a PTO has run for a length of time after the flange has become loose, the flange and/or bearing cap
may not be to manufacturing tolerance and should be replaced.
Torque Chart
Outputs Family
Pump Flange to
Bearing Cap
Capscrew P/N
Qty.
Size
Capscrew
Capscrew
Bag Kit
Recommended
Capscrew
Torque
GA, GB, PA, PF,
RA, RB, RE, & RF
6-Bolt 378447-6 3
0.312" - 18 x
1.000"
328170-207X
24-28 lbs-ft
[33-39 Nm]
RC, RD, & RH 6-Bolt 378446-4 6
0.250" - 20 x
0.750"
328170-210X
8-12 lbs-ft
[11-16 Nm]
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