American Pneumatic Tools logo

American Pneumatic Tools
Authorized Distributor

We distribute quality APT Air Tools: Paving Breakers, Rock Drills, Backfill Tampers, Chipping Hammers and other tools for the construction and mining industries.

MDR 75 RV Hydraulic Post Driver

From soft soil to hard asphalt, APT post drivers give you plenty of power to drive down posts with little effort.  Impressive blow force helps you keep working productively so you can finish the job faster.  These models are designed for driving posts or rdos for fences, road signs, crash barriers, tent ancors and other applications.


  • Light weight, high-frequency driver (MDR 30) has a built-in trigger handle for fast driving of small-diameter rods, anchors, takes, ets.
  • All around driver (MDR75) is effective for post driving, anchoring and fencing, as well as steel or wood posts
  • RV version (MDR 75 RV) has an on/off vavle mounted at the end of a 6.5 ft. long tail hose for remote operation on long poles.
1801405004 CALL
Activation Type Remote Valve
Hydraulic System Open or Closed Center
Weight (lb) 75
Oil Flow (gpm) 8
High Back Presssure YES
Working Pressure (psi) 1500-2000
Impact Rage @ 30 l/min (bpm) 1680
Hydraulic Ports (in) ½ BSP
Vibration Level 3 Axes (ISO 28927-10)1) (m/s) 12.8
Sound Pressure Level (ISO 11203)1) Lp, r-1m 102
Consumable Tools
Post Driver Tools
Spare Parts List
Safety & Operations Manual
Power Pack Bio Oil Safety & Data Sheet
Part No.DescriptionPrice
Common Replaceable Parts
3371806033 Universal Adaptor - 2½" CALL
3371806034 Round Adaptor - 3-3/4" CALL
3371806060 Round Adaptor - 4" $44.00
3371806032 Square Adaptor - 2" CALL
9246929578 Male Cap for Hollow Post - 3.75 x 2.5" QUOTE
9246929845 Female Round Cap - 3.75 x 3.5" QUOTE
9753231041 Telescoping T-Post Adaptor $145.00
1801163321 Oil Flow Divider - OFD5 $705.00
1801164319 Oil Flow Divider - OFD8 $955.00
AC-3371801087 Twin Extension Hose - 23' $442.00
AC-3371801089 Twin Extension Hose - 39' $442.00
1807011038 APP13 Hyd Power Pack CALL
1807016052 APP18 Hyd Power Pack CALL
1807016054 APP18 Twin Hyd Power Pack CALL
3371807751 Power Pack Bio Oil - 1 Gal $96.93


Now you can use your skid steer, backhoe, excavator, or tractor to power your breaker.  These tools are designed to work with high back pressure and represent a breakthrough in versatility.

These units are able to work on a maximum return/back pressure of 508psi (200 psi for non-high back pressure units)

  • Flow requirement of 8 gpm (Same as non-high back pressure units).
  • Working pressure at approximately 1668 to 1885psi with maximum relief valve setting at 2200 psi. (Same as non-high back pressure units.)
  • To ensure the tool is receiving the correct flow of 8gpm, you will need OFD8 (1801164319).  Max flow in:  32 gpm; Max pressure:  360psi
  • No warranty for tools damaged by over-pressure when run without an oil flow divider.
  • **For John Deere and Bobcat Skidsteer that deliver between 16 and 30gpm - pressure reduction hoses must be used in conjuntion with the OFD