Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654  USA
III
Bulletin HY25-1806-M1/US
Table of Contents
Owner’s Manual
252 Series
General Information
 Foreword ................................................................................................................................................ 1
  Safety Information ............................................................................................................................... 1-3
  Chelsea PTO Safety Label Instructions ................................................................................................. 3
  Pump Support Requirements ................................................................................................................ 4
  Function of Auxiliary Power Shafts ........................................................................................................ 5
 Spicer
®
 Universal Joint Engineering Data .............................................................................................. 6
Allison Installation
  Pre-Pump Installation............................................................................................................................. 8
  PTO Installation
    GM 3600 Chassis ........................................................................................................................... 9-13
    Allison 1000, 2000/2500 ............................................................................................................... 14-16
  Installation Sketches
    Allison Transmission 1000, 2000/2500 (12V) w/out Speed Limiter (Sk-456 Rev D) .......................... 17
Dodge/Sterling/Ram Installation
  Dodge/Sterling Overview (MY2010 & Prior) ........................................................................................ 20
  RAM Overview (MY2011 & MY2012) ............................................................................................. 21-22
  RAM Overview (MY2013 & Later) ................................................................................................... 23-25
  Pre Installation Overview ................................................................................................................ 26-27
  Heavy Duty PTO Installation Instructions........................................................................................ 28-29
  Chassis Cab Wiring Reference (MY2011 & Later) ............................................................................... 30
  Installation Sketches 
  Dodge/AISIN MY2007 - MY2010 (AS68RC) Transmission Shift Option D (SK-455 Rev B) ................ 31
  Wiring Charts (MY2007 - MY2010) ...................................................................................................... 32
  AISIN (AS69RC/AS66RC) MY2011 & Later Transmission w/o EOC Shift Option R (SK-495) ............ 33
 RAM/AISIN (AS69RC) MY2013 & Later Transmission w/o EOC Shift Option R (SK-567) .................. 34
  Wiring Installation Instructions (MY2011 and Later) ....................................................................... 35-36
PTO Maintenance ................................................................................................................................... 37
Offer of Sale .................................................................................................................................................... 39