Model Spotlight

Case 686G Telehandler: G-Generation Telescopic Material Handler

The Case 686G is a G-generation telescopic material handler built for construction, agriculture, and industrial duty. With a multi-stage telescopic boom, 4WD driveline, and multi-mode steering, the 686G delivers all-terrain reach and lift capacity that on-road forklifts can’t match.

BT

Broken Tractor Editorial Team• Updated May 2026• 8 min read

Where the 686G fits in the Case telehandler line

The Case 686G is a G-generation Case telehandler sized in the mid-class of the Case telescopic material handler family. Built for construction, agriculture, and industrial material handling, the 686G blends all-terrain maneuverability with multi-stage telescopic reach and strong lift capacity. The G-generation platform was Case’s answer to job-site duty that demands more than an on-road forklift can deliver - muddy construction pads, rutted ag yards, and industrial material handling where 4WD and multi-mode steering are required.

Engine, transmission, and boom hydraulics

The 686G runs a Case / CNH diesel through a powershift transmission into a 4WD driveline with multi-mode steering offering 2WS, 4WS, and crab modes. The multi-stage telescopic boom carries the load through a heavy-class lift cylinder and a multi-stage extension cylinder; the tilt cylinder controls fork or attachment angle. All-terrain wheel-and-tire configuration delivers off-pavement capability that distinguishes the 686G from on-road forklifts.

The boom assembly itself is the highest-wear subsystem on the machine. Multi-stage telescopic booms rely on wear pads at the top, bottom, and sides of each boom stage to keep the sections aligned and to prevent metal-on-metal contact. Routine wear-pad inspection and replacement is what keeps a 686G boom straight, square, and free of slop under load.

Common service items on the 686G

• Engine internals: Case / CNH diesel pistons, rings, sleeves, bearings, head gaskets, full overhaul kits.
• Cooling system: Radiator, water pump, thermostat, fan, hoses, belts, charge-air cooler, hydraulic oil cooler.
• Powershift transmission: Powershift clutch packs, transmission filters and oil, torque converter service.
• Drivetrain - axles: 4WD front and rear axle service, planetary final drives, driveshafts, steering joints.
• Boom hydraulics: Multi-stage extension cylinder, lift cylinder, tilt cylinder seal kits.
• Boom wear pads: Multi-section wear pads (side, top, bottom on each boom stage). Routine inspection required.
• Carriage / attachments: Quick-attach carriage hardware, fork tine wear, fork retention pins, attachment hydraulics where third-function plumbed.
• Steering: Multi-mode steering valve (2WS / 4WS / crab), steering cylinder seal kits, mode actuator.
• Brakes: Wet-disc service brakes, brake oil filters, park brake actuation.
• All-terrain tires + rims: Heavy off-road radial tires, rim and wheel-bearing service.
• Cab and electrical: Cab HVAC, ECU, instrument cluster, sensors, wiring harness, alternator, starter.

Parts and cross-fit components for the Case 686G

What to verify before ordering

• Serial number. Confirm the serial on the chassis rail or cab data plate before ordering year-specific boom or transmission parts.
• Engine serial. Case / CNH diesel internal parts are calibrated to specific engine serial groups.
• G-generation revision. G-series telehandlers saw running revisions during production - confirm chassis revision by serial.
• Boom-section wear-pad position. Multi-stage boom wear pads are position-specific - confirm boom section and position before ordering.
• Third-function hydraulics. Attachment hydraulics (third function) are an option - confirm before ordering attachment-specific hydraulic service parts.
• Multi-mode steering option. 2WS / 4WS / crab mode selection may be standard or option-dependent - confirm steering mode configuration before ordering steering hydraulic parts.

Why the 686G still earns a paycheck

The Case 686G stays in service because rugged G-generation telehandlers were built for the worst job-site conditions - muddy construction sites, rutted ag yards, industrial scrap and material handling where on-road forklifts can’t go. All-terrain capability plus multi-stage boom reach plus 4WD plus multi-mode steering means one machine can move material anywhere on the site.

Maintenance priorities on a 686G: clean fuel and quality filtration on the CNH diesel, powershift transmission oil quality, boom-wear-pad inspection on every boom section, boom hydraulic cylinder seal condition, multi-mode steering valve health, all-terrain tire condition, and standard cooling system service. Broken Tractor maintains parts coverage for the Case G-generation Telehandler line.