3.3. Reassembly 3.3.1. Re-assembling the hydraulic head Install the plunger. Install the rack guide. Rack guide Control sleeve Rack auxiliary SP Rack Upper lead Distribution shaft sleeve Upper spring retainer L Sub-lead Ball Identification marking Attaching rack and rack guide ! When installing rack guide, push it against the ! Note that the positional relationship of the upper distribution shaft sleeve and upper spring retainer so lead and sub-lead of the plunger and the ball of that the rack is in parallel with the direction of the control sleeve is as shown below. (Plunger identification marking (such as "W4") and the ball camshaft.
(T = 3 to 4 N m) of the control sleeve are oriented in the same ! Movable range of rack is to be equal to or larger direction.) than ± 7 mm. ! Be careful that the plunger is NOT inserted ! Fix the rack at the position of L = 25, and measure upside down. the effective stroke and sub-step (overflow stroke) to check that they are within the standards (Refer to attached drawing 1.) ! The rack must not separate from the ball of the control sleeve within the movable range. ! Fix the plunger with a jig and measure the total backlash. (To be equal to or less than 0.2 mm) !
The load of rack auxiliary SP must be able to return the rack from the maximum decreased position to Install the control sleeve and spring retainer. the maximum increased position). 29