Model RL-3 - Rear Mount

The rear-mounted RL-3 is designed for loading into attached trailers or into separate haul trucks.

  • 20 ft. boom reach includes 4 ft. telescopic extension
  • Standard control type is dual walk-thru
  • Also available with patented QUADSTICK® controls – 4 six function mechanical joysticks
  • Trailer package option – includes float control, pintle hitch, diverter valve, and quick coupler
  • Boom stows in rear rack or in trailer






Greaseless dual walk-thru controls operational from either side of truck. Petersen also offers QUADSTICK® controls and stationary top mount controls with joysticks or valvehandles.


Out and down outriggers improve safety in traffic and reduce damage to streets.


Boom swing does not have any exposed pinion or bull gears. Petersen’s rotary actuator boom swing method is lower maintenance.


Four foot tip extension adds flexibility and maneuverability. Tip extension hoses are enclosed and protected.


Petersen Industries manufactures and installs both the grapple loader, including bucket and controls, and the trash dump body.


The standard dual walk-thru has an overall height of 11’3″.


Boom cylinders have counterbalance valves, and outrigger down cylinders have pilot operated check valves to prevent leakdown or collapse in the case of hose rupture.


Continuous rotation for convenience.


Reduced downtime due to elimination of hoses in bucket jaw area.


Reverse curve motion of bucket helps prevent scalping of lawns.


Three year structural, one year hydraulic.



System Description
Petersen Model RL-3 rear-mounted loader is mounted to a short frame chassis. The RL-3 loads into attached dump trailers or into separate haul trucks.

Reach (from centerline rotation): 20 ft
Main Boom and Tip Boom: 16 ft
Tip Extension: 4 ft
Tare Weight (Empty): 18,2401bs
Front Axle Weight: 5,100 lbs
Rear Axle Weight: 13,140 lbs
Outrigger Span: 11ft 8in
Storage Height: 13ft 2in

Lifting Capacities
                  Over Rear        Over Side
10 ft           7,100 lbs          5,500 lbs
16 ft           4,400 lbs          3,100 lbs
20 ft           3,2001bs          1,800 lbs

Weight of bucket and/or attachments must be subtracted from lift capacities shown. Standard bucket weighs appx. 1000 lbs. Capacities shown do not exceed 85% of vehicle tipping moment with outriggers fully extended on firm, level ground.

Bucket Features
The bucket is 4ft long wilh an opened width of 5ft between pickup blades. Anti-scalping bucket sides are pivot mounted to provide a horizontal closing action rather than a vertical digging motion. Sides
are mechanically linked to single hydraulic cylinder to ensure that both sides close and open together.
No hydraulic hoses below bucket rotator.

Recommended Chassis Specification (Minimum)
Body Style                                    Conventional Cab
Cab-to-Axle Dimension                84 in
Front Axle Rating                           9,000 lbs
Rear Axle Rating                            21,000 lbs
Gross Vehicle Weight Rating      30,000 lb
Frame RBM                                      900,000

Operator Controls
Dual manual controls (greaseless) for outriggers and loader on bolh sides of Ihe lruck for easy access and visibility. Also available wilh “QuadSlick” dual joyslick controls. Side-mount seat controls or allweather cab are available.

A-frame pedestal design allows flexing under repeated load shocks. Replaceable Cast Nylon bushings used in head assembly. Head assembly is stress relieved. Reinforced connection points with hardened pins and replaceable bushings. Counterbalance valves used on boom cylinders and pilot operated check valves used on vertical outrigger cylinders.

Dual Walk-Thru Controls

dual-walk-through-controlsGreaseless dual controls are operator friendly and maintenance free!

• DUAL CONTROLS: Control platform to be located directly behind conventional cab to allow operator access from the truck cab without ever having to touch the ground. A single bank of control valves to be mounted at the mid-point of loader, with control handles accessible from the operator platform on either side of truck. Control handle pattern must be the same on both sides of the truck for superior visibility. Control handles shall not require lubrication. A “Grip Strut” serrated steel walk platform is included.


QUADSTICK® mechanical controls


Completely mechanical! No high maintenance electronics!

• JOYSTICK (dual walk-thru): Petersen mechanical QUADSTICK® controls. Each of the four joysticks has six functions to control loader operation. Outriggers are controlled by two joysticks at the center of the operator platform. When applicable, body dump is controlled by a single lever at the center of the operator platform.

PATENT #7,353,652 B2


Stationary Top mounted controls


PI Stationary Top Mount controls give the operator a good view into the body for sorting.

• TOP MOUNT: Operator station is located on a stationary platform above the truck cab. The control valves are mounted under the seat, with the control handles between the operator’s legs for easy access. A ladder, safety railing, padded seat with arm rests, and seat belt are provided.


Top mounted joystick controls


Mechanically linked! No high maintenance electronics!

• JOYSTICK (top mount): Two mechanical six function joysticks located on either side of the operator seat control loader operation. Outrigger controls are located to the left of the operator seat.


Outrigger pads


4x12x12 rubber pads mounted on bottoms of outrigger feet help prevent outriggers from causing damage to curbs etc.


All purpose trash grapple


Petersen’s trash bucket is actuated by a single double-acting cylinder and capable of continuous rotation with no need for physical stops. The bucket motor, Model RE, has a 5,500 in. lbs. torque rating. Petersen buckets have the capability to be rolled over on the load without damage to any components, allowing for a maximum load while keeping boom height within acceptable limits. An anti-scalping feature is standard and advantageous for jobs requiring increased precision (ex: sidewalk removal).

The bucket also incorporates:

  • 3/16″ plate, smooth steel clamshell scoop for leaves and sand
  • End plates minimum of 5/8″ thick and of A-572 grade 50, 50,000psi steel
  • A minimum of 5 ribs per side to handle branches, logs and appliances
  • A trample ram in the center for compressing trash in body.
  • Replaceable bolt-on bucket blades made of high impact tempered steel

The bucket is 4 ft. long with an opened width of 5 ft. between pickup blades. Anti-scalping bucket sides are pivot mounted to provide a horizontal closing action rather than a vertical digging motion. Sides are mechanically linked to single hydraulic cylinder to ensure both sides close and open together. There are no hydraulic hoses located below bucket rotator.


Crab – front load container attachment


No more chains!

The crab attachment can lift all sizes of standard front loader containers.



Head-Mounted Dual Strobes


Dual strobes mounted on the pedestal head.


Hose Guards/Shields


Metal guards cover the valve bank and back of head assembly to protect operator on walk thru platform from hydraulic fluid in the case that there is a leak at these connection points.

Hose sleeves also available.

Only on walk-thru type controls.


Double wire braided hose


3/8” 100R2 double wire braided hoses. 4,000 working pressure. 16,000 burst pressure.


Grating Heat Shield for Walk-Thru Controls


Designed to shield operators from the radiant heat produced by the truck. Includes a flap of PVC belting that is bolted to the platform to cover the gap between the chassis cab and the platform, and two overlapping sheets of 18.5 in. wide 14 gauge sheet metal installed below the walking area of the grip strut platform.