Bush Hog® Boom Mowers

Bush Hog® Extend your reach and productivity!

RMB1445-1, RMB1660-1, RMB1865-1 and the PT5 Powertrim-2

The ultimate in versatility, Bush Hog’s rugged, tractor-mounted boom mowers are designed to trim trees, brush or hedges and mow behind guardrails, over fences, down embankments and around ponds. With four models reaching 11 to 18-feet from the tractor centerline, there’s almost no limit to what you can accomplish. They’re easy to operate and built to provide years of dependable service.

NOTE: (RMB models to be used on tractors equipped with cabs only, and for rotary mower heads, protective screen material must be installed.)

Notes: Unit(s) shown equipped with certain selections and options; please consult with your local Bush Hog dealer for all available configurations.

Construction Features

  • RMB models offer optional accessories such as a lift float kit and skid kit on certain models.

Product Features

FLAT HEAD Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

PT5-2 POWERTRIM 3/4” Cutting Capacity 59” Cutting Width (All booms equipped with hydraulic or mechanical breakaway.)

CUTTER BAR Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

The unique PT5 is powered by the tractor’s hydraulic system, requiring only 3.7 gal/min. flow to operate the unit. A Flow Control Valve Kit comes standard on current models to divert excess hydraulic flow back to the tractor. The PT5 fits tractors as small as 15 HP. Its unique “swing over” design enables the unit to workon either side of the tractor. The PT5 is equipped with a swing arm, sickle bar head to meet the pruning needs of horticulturists and landscapers alike.

 

ROTARY HEAD Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

All RMB models offer self contained, fully independent hydraulic systems with twin pumps for optimum cutting performance

RMB1445-1, RMB1660-1, RMB1865-1 (RMB models to be used on tractors equipped with cabs only.)

Good for Tractors rated 40hp or under

Specifications

Boom Mowers
RMB1445-1
RMB1660-1
RMB1865-1
PT5 Powertrim-2
Tractor Engine HP / Weight (Min.)
See Head Selection Chart Below; Varies Based on Head Choice
Tractor PTO
540
540
540
N/A
Machine Weight w/Flail*
1220-lbs.
2403-lbs.
2470-lbs.
397-lbs.
Hydraulic System
Totally Independent
Totally Independent
Totally Independent
Open Center Hydraulics System Only. Tractor Remote Outlet. 3.7 – 5.6 GPM Flow Range Flow Control Valve Kit Comes Standard on Current Models
Attachment Method
Cat. I/II, 3 Pt. Mount
Cat. I/II, 3 Pt. Mount
Cat. I/II, 3 Pt. Mount
Cat. I, 3 Pt. Mount
Controls
Cable Controlled Quick Detach (QD)
Cable Controlled Quick Detach (QD)
Cable Controlled Quick Detach (QD)
Cable Controlled
Max Reach, Horizontal (A)
14-feet 1-inch
16-feet 5-inches
18-feet 1-inch
12-feet 4-inches
Max Reach, Vertical (B)
13-feet 2-inches
14-feet 6-inches
16-feet 1-inch
7-feet 2-inches
Max Height, Horizontal (C)
13-feet 5-inches
15-feet 9-inches
17-feet 5-inches
10-feet 6-inches
Max Height, Vertical (D)
13-feet 9-inches
20-feet 8-inches
22-feet 4-inches
16-feet 3-inches
Max Depth, 45° (E)
5-feet 4-inches
7-feet 3-inches
8-feet 2-inches
4-feet 6-inches

 

Flail Head
RMB1445-1
RMB1660-1
RMB1865-1
Tractor Engine HP / Weight (Min.)
45 HP/4410-lbs.
60 HP/6614-lbs.
65 HP/7716-lbs.
Rotor / Knife Type
Super Cut/Universal
Super Cut / F91 Competition knives or Multi-Cut / Competition
Typical Application
Grass, Light Brush
Hedge Cutting, Grass
Hedge Cutting, Grass
Cutting Capacity
1-inch Diameter
1 1/2-inch Diameter
2-inches Diameter
Cutting Width
39-inches
47-inches
47-inches

 

Cutter Bar
RMB1445-1
RMB1660-1
RMB1865-1
Tractor Engine HP/Weight (Min.)
45 HP/4410-lbs.
60 HP/6614-lbs.
65 HP/7716-lbs.
Cutter Type
Sickle Bar
Sickle Bar
Sickle Bar
Cutting Capacity Diameter
1 1/4-inch Diameter
1 1/4-inch Diameter
1 1/4-inch Diameter
Cutting Width
59-inch
59-inch
59-inch

 

Rotary Head
RMB1445-1
RMB1660-1
RMB1865-1
Tractor Engine HP/Weight (Min.)
Not Available for use on RMB1445
85 HP/7614-lbs.
85 HP/8716-lbs.
Typical Application
N/A
Grass/Brush
Grass/Brush
Cutting Capacity
N/A
4-inches Diameter
4-inches Diameter
Cutting Width
N/A
60-inches
60-inches
* For Rotary Head, protective screen material must be installed.

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