Steering Stem Bearing

STEERING 14-13

NOTE

○If either steering stem bearing is damaged it is recom­mended that both the upper and lower bearing (includ­ing outer races) should be replaced with new ones.

• Remove the lower inner race [A] (with its grease seal)
which is pressed onto the steering stem, with the steering
stem bearing puller [B], [C] and adapter [D].

Special Tools - Bearing Puller: 57001-158

Bearing Puller Adapter: 57001-317 Bearing Puller: 57001-1575

Stem Bearing Installation

• Replace the outer races with new ones.

• Apply grease to the outer race, and drive them into the head pipe using the drivers and press shaft [A].

Special Tools - Head Pipe Outer Race Press Shaft: 57001

-1075 [A] Head Pipe Outer Race Driver, 046.5: 57001

-1106 [B] Head Pipe Outer Race Driver, 051.5: 57001

-1076 [C]

• Replace the inner races with new ones.

• Apply grease to the lower inner race [A], and drive it onto the stem using the driver and adapter.

Special Tools-Steering Stem Bearing Driver: 57001-137 [B] Steering Stem Bearing Driver Adapter, 034.5: 57001-1074 [C]

• Apply grease to the upper [A] and lower [B] bearings.

• Apply grease to the upper inner race, and install it in the head pipe.

• Install the steering stem through the head pipe and upper bearing, and hand tighten the stem nut [A] while pushing up the steering stem.

• Settle the inner races in place as follows.

OUsing the steering stem nut wrench, tighten the stem nut 39 N-m (4.0 kgf-m, 29 ft-lb) of torque. To tighten the steering stem nut to the specified torque, hook the wrench on the stem nut, and pull the wrench at the hole by 220 N (22 kgf, 49 lb) of force [B] in the direction shown.

Special Tool - Steering Stem Nut Wrench: 57001-1100 [A]

OCheck that there is no play and the steering stem turns

smoothly without rattles. If not, the steering stem bearings

may be damaged. OBack out the stem nut a fraction of a turn until it turns

lightly. OTurn the steering stem nut lightly clockwise until it just

becomes hard to turn. Do not overtighten, or the steering

will be too tighten.

Torque -Steering Stem Nut: 4.9 N-m (0.50 kgf-m, 43 in-lb, for reference)

Stem Bearing Lubrication

• Refer to the Stem Bearing Lubrication in the Periodic
Maintenance chapter.

Stem Bearing Wear, Damage

• Using a high-flash point solvent, wash the upper and lower tapered roller in the cages, and wipe the upper and lower outer races which are pressed into the frame head pipe, clean off grease and dirt.

• Visually check the outer races and rollers.

• If they show the damage, replace the bearing assemblies with new ones.

FRAME 15-1 15

Дата добавления: 2014-12-23