336 Excavator

  • Specs Summary
  • Operating Weight
    20569 lb (9330 kg)
  • Standard Compaction Width
    59 in (1500 mm)
  • Gross Power
    102 hp (75 kW)
  • Net Power - EEC 80/1260

CB44B Tandem Vibratory Roller (Split Drum)

The Cat® CB44B is an 8 ton roller with 1500 mm (59") tandem vibratory drums. It excels on a variety of asphalt mix designs as well as other granular materials. It features exceptional visibility and control, smooth operating powertrain, versatile vibratory systems, Cat Compaction Control, and the industry leading water spray system.

Exceptional Visibility and Control

Comfortable Operating Station

The machine controls and LCD display are integrated with the pivoting adjustable seat, and move with the operator. Seating options include vinyl for open-platform configurations and cloth for cab, both can be equipped with a heated option. An optional deluxe highback air-ride seat is also available. Other comfort features include a vibration-absorbing floor mat, 12-volt power receptacle that supports communication devices, wide-width seat belt, cup holders and a lockable storage compartment.

Fingertip Control

The multi-function propel lever with integrated controls for water spray on/off, drum offset, vibratory control, and optional edge cutter height adjustment enables the operator to work with confidence.

LCD Display

The back-lit LCD display includes machine data and diagnostics. It is integrated with the seat, so it remains in same position even as the seat pivots. A built-in lockable anti-vandalism cover offers protection. The display provides multiple language options, split-screen capability, and indicators for ground speed, vibrations per minute, and fuel level.

Convenient Console

The console is integrated with the seat, providing fingertip access. Soft keys with tactile feel provide instant feedback to the operator for intuitive operation. The armrests are adjustable and can be tailored to the operator for additional comfort.

Vibratory System

Split Drum Design

The exclusive split-drum design delivers excellent mat quality in urban environments when frequent turning is required. When turning, the outside drum half rotates faster than the inside drum, eliminating the potential for shoving and tearing that occurs on standard vibratory drum designs. The exclusive axle-type pod design utilizes tapered roller bearings that support each drum half and eliminates any potential for contact between the two halves.

Dual Amplitude/Dual Frequency Vibratory System

The dual amplitude, dual frequency vibratory system can be tailored to thin and thick lifts. A single switch automatically matches amplitude and frequency for simple operation.

Performance Features

The vibratory system offers multiple options that help fine-tune performance. The automatic speed control feature makes it easier to maintain consistency and impact spacing requirements. Also, an auto vibe function helps prevent over-compaction and contributes to uniformity.

Cat® Compaction Control

Temperature Sensors

Dual infra-red sensors mounted on the front and rear of the machine deliver real-time readings that keep the operator informed of when to begin rolling and when to stop. This system helps operators avoid tender-zones that often occur in the 104º-110º C (219º-230º F) temperature range.

Pass-Count Mapping

Pass-count mapping helps operators achieve target density and increase roller efficiency. The system records and monitors pass patterns in order to display coverage. The system also helps operators optimize drum overlap, simplify nighttime operation, eliminate second guessing and prevent incomplete passes such as stopping short.

Temperature Mapping

Temperature mapping provides a visual readout of mat temperature in order to keep the machine in the proper temperature range. The system records and monitors temperature for future analysis of the proper temperature range.

Smooth Operating Powertrain

Cat® C3.4B Engine

The C3.4B engine provides 75 kW (102 hp) of power and meets U.S. EPA Tier 4 Interim and EU Stage IIIB emission standards. It features an electronic control module (ECM), providing optimal performance through precisely synchronized timing and fuel delivery. The ECM enables advanced troubleshooting and diagnostic capabilities using Electronic Technician (Cat ET). Cat dealers are the single-source providers of all machine and engine warranty service (a Cat exclusive).

High Capacity Cooling System

The large capacity cooling system keeps the operating temperatures low, even in extreme conditions. Two high volume fans direct warm air away from the operator for a more comfortable operating environment.


  • Operating Weight 20569 lb (9330 kg)
  • Operating Weight at Rear Drum with ROPS/FOPS 10053 lb (4560 kg)
  • Operating Weight at Front Drum with ROPS/FOPS 9855 lb (4470 kg)
  • Operating Weight with cab 20569 lb (9330 kg)
  • Maximum Weight at Front Drum 10296 lb (4670 kg)
  • Maximum Weight at Rear Drum 10274 lb (4660 kg)
  • Operating Weight with ROPS/FOPS 19908 lb (9030 kg)

Operating Specifications

  • Standard Compaction Width 59 in (1500 mm)
  • Curb Clearance 35 in (898 mm)
  • Turning Radius Inside Drum Edge 14.6 ft (4478 mm)
  • Ground Clearance 9 in (226 mm)
  • Maximum Compaction Width 65 in (1670 mm)
  • Static Linear Load 174 lb/in (31.1 kg/cm)
  • Travel Speed - Maximum 7.5 mph (12 km/h)


  • Gross Power 102 hp (75 kW)
  • Bore 3.98 in (99 mm)
  • Stroke 4.33 in (110 mm)
  • Engine Model Cat® C3.4B with ACERT Technology

Service Refill Capacities

  • Fuel Tank Capacity 55 gal (208 L)
  • Water (Spray) Tank Capacity 196 gal (742 L)

Vibratory System

  • Drum Width 59 in (1500 mm)
  • Drum Diameter 44 in (1108 mm)
  • Frequency 3200 vpm (53.3 Hz)
  • Vibration Selection Independent per drum, front only, rear only, both
  • Eccentric Weight Drive Hydraulic direct, auto reversing
  • Centrifugal Force per Drum - Maximum 16591 lb (73.8 kN)
  • Centrifugal Force per Drum - Minimum 13309 lb (59.2 kN)
  • Nominal Amplitude - High 0.024 in (0.62 mm)
  • Nominal Amplitude - Low 0.012 in (0.31 mm)


  • Overall Length 177 in (4565 mm)
  • Wheelbase 130 in (3300 mm)
  • Height with ROPS/FOPS 117 in (2982 mm)
  • Compaction Width 59 in (1500 mm)
  • Overall Width 65 in (1670 mm)
  • Drum Diameter 43 in (1108 mm)
  • Drum Width 59 in (1500 mm)

Standard Equipment

Optional Equipment

Cat® Compaction Control

Edge Cutter


Offset Hitch

Water Distribution Mats

Cocoa Mats

Water Spray Freeze Protection Kit

High Intensity Discharge Lights

Warning Beacon

External Mirrors

Bio-Degradeable Oil

Product Link

Drum Edge Lighting Package

High Ambient Cooling System

Air Suspension Seat w/heat