Cat upgrades hydraulics in multi-terrain loaders

Caterpillar's 267B, 277B and 287B multi-terrain loaders feature new turbocharged engines with more power, higher breakout forces, redesigned operator station components, and, of course, refinements to the hydraulic system.

Caterpillar's new B Series of multi-terrain loader combine smart equipment design with strategic use of hydraulics to reduce and simplify maintenance without sacrificing performance or reliability.

The multi-terrain loaders are compact, rubber-tracked machines designed for exceptional versatility, flotation, traction, stability, and ride quality by combining the benefits of a skid-steer loader those of a suspended rubber track undercarriage. The suspended undercarriage transfers machine weight to the ground through wheeled contact points bearing against the track — resulting in low ground pressure.

The three new loaders are powered by Cat's new 3044C DIT diesel engine. It has a displacement of 3.3 l and develops up to 78 hp (59 kW) and complies to US EPA Tier 2 requirements. The 287B, largest of the three, has an operating capacity of 3600 lb (1632 kg), defined as 50% of tipping load.

All three machines use hydraulic joysticks that control pilot flow. Because the joysticks control hydraulics directly, they are less complex than their electronic cousins, highly reliable, and completely immune to electromagnetic and radio frequency interference. However, an optional deluxe joystick incorporates positive-action buttons to control work tool hydraulic or electrical functions.

Hydraulic system design improvements include fewer potential leak points, which improves reliability, cleanliness, and reduces maintenance. A 5-µm spin-on filter keeps hydraulic oil clean, and a high-efficiency hydraulic oil cooler allows the machines to work smoothly in high ambient temperatures.

The loaders' rear service door opens 90°, and access to service points — such as checking hydraulic fluid level — is configured for quick and convenient use. For access to hydraulic pumps, motors, and valves, a technician can tilt the cab rearward by using a single tool. A self-latching mechanism holds the cab in place. The cooling fan and air conditioning compressor are hydraulically driven to eliminate maintenance required by belt drives.