Roller bearing end cap screws, traction motor and gear case bolts, brake pins, truck, fuel tank and draft gear bolting, and engine and alternator studs and bolts, made in Houston to your drawings and specifications.
A six-axle AC diesel-electric freight locomotive on 42-inch wheels, taken apart the way a shop overhauls a truck: the coupler, fuel tank, hood and engine come off the underframe, the hold-down and traction link bolts spin out and the body lifts off its trucks, then the pads, brake pins and brake units come off, the truck frame lifts off its springs, the gear cases split, the axle caps and traction motors come off the axles, and the end cap screws, end caps and bearings come off the journals. The bolting we make is in colour. Press Solid view for a steel model, or Cutaway to see the leading axle's journal bearing, wheel and gear case in section.
Three cap screws through each axle end cap and its locking plate into the axle end, the plate's tabs bent flat against the heads: 1-1/4 in.-7 on the AAR Class G (7 × 12 in.) bearing drawn here. 36 on the locomotive.
Four large bolts (typical) close each axle cap on the traction motor's two support bearings: eight per motor.
Bolt the two half shells of the gear case round the pinion and bull gear to the motor frame and to each other at the split line: six per case, typical.
A bolt at each end of the link that hangs the motor's nose from the truck transom and stops it turning round the axle.
Four bolts (typical) hold each wheel's tread brake unit up to its bracket under the side frame.
Hang the brake heads and join the push rods, each secured with a cotter, split key or nut as 49 CFR 229.57 requires.
Bolt the base plates of the four rubber pad stacks that carry the body to the truck side frames.
A ring of bolts holds the centre pin's flange to the body bolster, plus a bolt at each end of the two traction links.
Hold the lugs that keep the truck and body together in a derailment, the securing arrangement 49 CFR 229.67(b) requires.
Clamp the carrier plate that holds the yoke and draft gear up in the draft sill.
The flat key that ties the Type E coupler to its yoke, and the pin and cotter that keep it in.
Hang the fuel tank from the underframe side sills on eight bracket lugs, four bolts each (typical); external tanks follow AAR S-5506 under 49 CFR 229.217.
Bolt the engine's crankcase feet down to the mounting pads on the main deck.
A ring of flange bolts to the engine's flywheel-end adapter, and the bolts through the alternator's feet.
Six studs and nuts clamp each of the twelve cylinder heads to the crankcase.
End cap screws, motor support bolts, brake pins, draft gear and engine bolting for locomotives, to your drawing. Send us your drawings and material spec.
Request a quote832-446-3442A generic six-axle AC road freight locomotive, not any builder's design. The journal bearings, end cap screws (three 1-1/4 in.-7 per journal), 42 in. wheels and track gauge follow published figures; the truck frame, motors, gear cases, brakes, suspension, underframe and engine are illustrative typical proportions, and every other bolt count and size is typical. Bolting is drawn on the front truck and front coupler; the rear ones carry the same. Your drawings govern. We manufacture to your drawings and specifications.
Drawn to the AAR Class G (7 × 12 in.) journal bearing figures in the bearing maker's installation guide and catalogue (a secondary source for the AAR Manual of Standards and Recommended Practices), AAR M-107/M-208 for the 42 in. wheels, standard 56-1/2 in. track gauge, and 49 CFR Part 229 for the brake pin, truck securing and fuel tank rules.
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