TP0003B
BM BULKMETER
Chap 5
Page 3
SERVICING
4
INVESTIGATION
4.1
If the meter is being dismantled because a fault is suspected, it is recommended that a preliminary
investigation is conducted to determine the general location of the fault.
4.2
Remove the rotor gear (4) and tension pin (5) from the rotor spindle and fit turning tool TASS 5006 in
its place. Turn the rotor spindle against the direction of the arrow on the manifold, the rotor should
revolve freely, failure to do so will indicate a fault within the body.
4.3
Turn the calibrating mechanism driving gear (8) to ensure that the gear train functions correctly.
4.4
Visually inspect the assembly for obvious faults e.g broken gear teeth, sheared tension pins etc.
4.5
Dismantle the faulty assembly by following the appropriate procedures described in Para 5 or
Para 6.
5
BODY ASSEMBLY - Dismantling
WARNING
FLUOROCARBON. THE SPINDLE SEAL, ITEM 12, MAY CONTAIN FLUOROCARBON. REFER TO
THE FLUOROCARBON WARNING ON PRELIM PAGE (vii)/(viii) OF THIS PUBLICATION.
5.1
Place the body assembly front face upwards on a bench.
5.2
Note the position of the two sealing bolts (21). Remove the fourteen nuts (25), spring washers (24),
twelve bolts (22) with plain washers (23) which secure the front outer cover (14) and inner cover (5)
to the body (1).
IMPORTANT
DO NOT ATTEMPT TO REMOVE THE REAR INNER COVER AS THIS IS FACTORY SHIMMED
TO THE BODY
5.3
Remove the front outer cover (14) and discard the ’O’ ring seal (15).
5.4
DO NOT REMOVE
the spindle seal (16) from the front cover unless it is defective, shown by product
leaking between the cover and the calibrating mechanism base. If replacement is necessary, remove
the three countersunk screws (19) and the retaining plate (17). The seal may now be withdrawn.
5.5
Remove the two screws (9) from front inner cover (5). Insert cover tools TASS5009 into the two
holes provided in inner cover (5). Screw down evenly on the tools and the inner cover, which is
dowelled into position, will be withdrawn. Remove the inner cover and discard the ’O’ ring seal (8).
5.6
IMPORTANT
: Do not remove the bearing adjuster (11) or screw (12) from the hub of the cover unless
a new rotor is being fitted. The bearing adjuster has a factory set clearance between the inner front
cover and the face of the rotor.
5.7
Fit the rotor tool TASS5006 to the rotor and turn so that two vanes are depressed against the
metering crescent. Refer to Fig 2.2.
5.8
Stand over the body and, with a smooth vertical lift, withdraw the rotor assembly, complete with
bearings (10) from the body casing.
IMPORTANT
:
During this operation care must be taken to avoid damaging the vanes.
Содержание Avery-Hardoll BM Series
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