The Trailer-HPU-Casinjac assembly includes a trailer, a hydraulic power unit, a casinjac, a electric winch and a rolling mount for the Casinjac.
When a workover-rig picks up the top of  the Casinjac. The winch snubs the Casinjac and the mount rolls forward.  When the Casinjac is returned to the trailer the rolling mount is moved forward by hand, the winch snubs the Casinjac while the rolling mount moves backward.
The Casinjac shown is a Model 282 - 60 - 10.75 -2
The HPU has a 4 - cylinder Deutz Engine  ( 6-cyl. available) with Pressure Compensated Piston Pump, proportional directional valve, panel mounted controls with pressure gauge, hydraulic reservoir and diesel tank.
The Trailer is a heavy duty gooseneck with 2 - 10,000 lb.axles, also available with 2- 12,000 or 2 - 15,000 lb. axles.
Plenty of room is available for hydraulic hoses, pull sub, and pipe slips.