Balance Mechanism - Vinten Vision 250 Service Manual

Contents

Balance mechanism

WARNING!: Pivot pins (15) are case-hardened and may chip around the screwdriver
slot. Use the correct size screwdriver and wear eye protection.
NOTE: Lubricate all bearings, shims and pivot points with LM grease.
22 If dismantled, assemble the balance mechanism as follows
22.1 At each spring assembly, lubricate pivot blocks (10) with Chesterton grease. Pass spring shaft
(12) through pivot block (10) and install balance spring (13) and spring cap (14) on spring shaft. Install
screw (19) using Loctite 270 and tighten until end movement of spring is eliminated, then apply a
further 3/4 turn. Press bearings (9, 11) into pivot block (10).
22.2 Install long link (16) in the adjustment bracket assembly (8) and secure with pivot pin (15).
Tighten pivot pin fully, back off, then apply Loctite 242E and torque tighten to 1.8 Nm (16 lbf in.).
22.3 Install a spring assembly on each side of the adjustment bracket assembly (8).
22.4 Press two bearings (3) into the load beam (4). Secure each spring assembly to the load beam
with two screws (5).
23 Install the balance mechanism as follows
23.1 Ensure tilt drag assembly (1) is horizontal.
23.2 Lubricate pivot pin on tilt drag assembly (1) and install four shims (2).
23.3 Press the assembled balance mechanism onto the pivot pin on tilt drag assembly (1).
23.4 Position lower end of long link (16) in slot in mechanism housing (27) and secure with pivot pin
(15). Tighten pivot pin fully, back off, then apply Loctite 242E and torque tighten to 1.8 Nm (16 lbf in.).
23.5 Install potentiometer rod (20) in potentiometer (21). Ensure potentiometer rod operates freely.
23.6 Install short link (17) in the adjustment bracket assembly (8) and secure with pivot pin (15).
Tighten pivot pin fully, back off, then apply Loctite 242E and torque tighten to 1.8 Nm (16 lbf in.).
23.7 Position potentiometer actuator lever (18) and lower end of short link (17) in slot in mechanism
housing (27) and secure with pivot pin (15). Tighten pivot pin fully, back off, then apply Loctite 242E and
torque tighten to 1.8 Nm (16 lbf in.). Ensure potentiometer actuator lever operates freely.
23.8 Lubricate thread of potentiometer nut (28) with M204G grease and install in forks of
potentiometer actuator lever (18).
23.9 Lubricate thread of adjustment bracket assembly (8) with Easyrun 50 grease.
(Fig 6.4):
(Fig 6.4):
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