Hitachi NR 90AD Technical Data And Service Manual page 31

(b) Reassembly (See Fig. 20.)
Disassembly procedures should be followed in the reverse order. Note the following points.
Apply grease to the O-ring (S-63) [32] and mount it in the groove of the Nose [29].
Insert Pushing Lever Springs (A) [52] and (B) [51] between the protrusion of Pushing Lever (C) [53] and the
protrusion of the Pushing Lever Guide [48].
Align the bent portion of Adjuster Plate (A) [58] with the concave portion of the Pushing Lever Guide [48].
After reassembly, check the components of the pushing lever and the Adjuster [54] move smoothly.
Pushing Lever Guide [48]
Be careful of the mounting direction of the Nose Rubber [34]. As shown in Fig. 21, mount the two Nose
Rubbers [34] so that their convex portions face downward.
Pushing Lever (C) [53]
Align these portions.
Bent portion of Adjuster Plate (A) [58]
Fig. 20
Nose [29]
Nose Rubber [34]
Fig. 21
Pushing Lever Spring (A) [52]
Pushing Lever Spring (B) [51]
Adjuster [54]
Protrusions
Nose Rubbers [34]
Mount the Nose Rubbers [34]
so that these convex portions
face downward.
--- 28 ---