Unibloc-Pump UNIBLOC-PD 501, Руководство по эксплуатации и обслуживанию

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16 UNIBLOC-PD Operation & Service Manual: PD501-576
4.2 Gearbox Assembly
The following steps for assembly
assume that the pump has been
completely disassembled. Make sure
all parts are clean and free of debris
before proceeding. New oil seals are
required to complete the assembly of
the gearbox.
4.2.1 Assembling the
Gearbox
Insert the shim rings (11a) into the
front bores of the gearbox (6). Oil
the front and rear bearing (10) cones
and tap them into the gearbox so
that the tapered edge can be seen
when looking into the gearbox. If the
bearings have been removed from the
shafts, they must be pressed on with
a hydraulic press before the shafts are
installed into the gearbox. Oil the
shafts at the bearing seat location and
slide the bearings on so that the text
on the bearing shoulder will make
contact with the shaft shoulder. Use
extreme caution to not damage the
bearing components or the splined
shaft end when using the hydrau-
lic press. Place a nonmetal object
between the splined shaft end and the
hydraulic press to prevent damage to the shaft. Insert both shafts and stand the pump on the splined ends. Slide the rear bearings
on, tap the keys (21) into place, and then slide on the gears (8), shoulder side towards the bearings. Make sure the timing marks
are aligned. Tap on the gears to seat the bearings properly. Slide on the tab washers (12) and thread on the slotted nuts (13).
Slide on the rotors (3a,3b) and place a nonmetal object between the rotors to keep the shafts from turning. Tighten the nuts so that
the shaft rotating torques shown in section 4.4 are achieved. The torque can be measured by inserting the rotor bolts (14a,14b) in
the splined shaft ends with the rotors on. Do not set the tabs on the tab washers. Remove the rotor bolts and rotors. Push the ro-
tor housing (1) onto the dowels (20) in the gearbox and tap gently with a rubber mallet to seat it properly. Insert the housing studs
(15) and secure them with the split washers (44) and hex nuts (43). Slide the rotors (3a,3b) on to the corresponding shaft. One
rotor and one shaft will be marked with identical symbols. Secure the rotors with the rotor bolts (14a,14b). Measure the clear-
ances between the rotors and the housing. If the measured values at positions 8-11 do not correspond with those listed in section
5, then the shim ring(s) (11a) must be changed. Remove the rotor bolts, rotors, studs, and then the housing. Unscrew the slotted
nuts and remove the tab washers. Remove the shafts, gears, and keys from the gearbox. Tap out the front bearing cups only to
reveal the shim ring(s). Insert an appropriate shim, and then repeat the steps described in this section. If the clearances fall within
the ranges specified, then proceed to section 4.2.2.
4.2.2 Assembling the Gearbox- Final Steps
Lock the nuts in place by bending the tab washer into the slots in the nut. Install the front oil seals (23) by first lubricating with
oil all contact areas on the shafts and gearbox. The text on the seals should face out. Push the seals on with a sleeve flush with
the gearbox. Stand the pump on the splined ends and fill the gearbox cavity with approved oil listed in section 4.3. Place the oil
seal (24) in the gearbox cover, text side out. Place the o-ring (25) into the groove on the rear side of the gearbox. Slide the cover
onto the drive shaft taking care not to damage the oil seal lips. Secure the cover with the bolts (18). Tap key (22) into place.
Install the shaft seals and rotor housing as described in section 3.
Figure 4.2