CYLINDERS SECTION 10C
Page 21
DRESSTA TD-25M EXTRA
BLADE DOUBLE TILT AND PITCH CYLINDER
19. REASSEMBLY (Refer to Fig.’s 10C.28 and 10C.29)
1. Position socket cap (17) and cover (16) onto cylinder rod (18).
IMPORTANT: Outer end of gland is determined as bolt end and inside end as facing piston.
2. Coat the bore and grooves of gland (10) with fresh grease. Install seal ring (13) by squeezing
the side of the seal together and starting the seal into the groove. Then work the remainder in
with the thumbs. DO NOT use a screwdriver as it will damage the seal.
3. Install O-ring (19) with buffer ring (12), notched edge facing in, into gland (10) and follow with
wear ring (11). Install O-ring with backup ring (9) onto gland (10). Install wiper ring (14) and
slide gland (10) onto rod (18). The tapped holes in gland (10) must face toward the rod ball.
4. Install piston seal (8) onto piston (7). Install O-rings (6) and wear rings (5) on each end of
piston (7). Install and slide piston onto rod (18). Secure with washer (4) and nut (3). Clamp
ball rod into press as shown in Fig. 10C.32. Using a multiplier torque piston nut (3) to
3250 [Nm].
5. Secure cylinder housing (1) to hoist frame. Attach hoist to socket cap (17) and
lower rod assembly into housing (1) using extreme care not to damage wear rings (5) and
piston seal (8). Once piston (7) has entered housing, drive rod 1/2 stroke.
Fig. 10C.33. Seating Gland with Lock Ring
6. Tie cover (16) to socket cap (17) to provide working clearance. Start gland assembly (10) into
housing (1) and drive in just below lock ring groove in housing. Install lock ring (15) into
housing groove. Install two puller bolts 1/2”NC - 1-3/4” and nuts (Fig. 10C.33) and thread into
gland. Tighten nuts to draw gland up against lock rings. Remove puller arrangement and
lift cover (16). Coat inner cylinder housing surface over the gland with high temperature type
230 HHT grease 1 [mm] in thickness. Secure cover (16) to gland (10) and torque bolts with
washer to 110 - 120 [Nm].
7. If removed, install the cylinder bushing (2) to cylinder housing (1).
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