BOSS 2136754 - Caterpillar

Crushing Hazard. Connect the steering frame lock between front and rear frames before servicing the machine in the articulation area. Disconnect the steering frame lock and secure it in the stored position before resuming operation. Failure to do so could result in serious injury or death.
Refer to Operation and Maintenance Manual, "Steering Frame Lock" before entering the articulation joint.Note: Do not disconnect any hydraulic lines from the metering pump.
Illustration 1 g01350605
HMU in the articulation joint
Use the following steps to lubricate the splines on the steering column:
Illustration 2 g01350606
(1) HMU
(2) Bolts
(3) Steering Column
Support the metering pump (1). Loosen the four bolts (2) that hold the pump. Do not loosen the hose couplings.
Lower the pump in order to expose the splines on the end of the steering column (3).
Clean the male splines on the steering column. Clean the female splines in the pump.
Apply proper grease to the splines. Refer to Operation and Maintenance Manual, "Lubricant Viscosities"
for selecting the proper grease.
Push the pump into position.
Tighten the four bolts that hold the pump.
Test the steering system.