Identifying Modified Bottom Clamps - Vinten Vision Pozi-Loc Maintenance Manual

Contents
One-stop/two-stop
1 To prevent the bottom clamps on two-stage Pozi-Loc tripods being damaged by inadvertent
overtightening, the bottom clamp housing and clamp knob were modified to a two-stop version. At the same
time, the securing thread for the knob and the thread for the locking grubscrews was increased from M4 to
M5. Clamp components are not interchangeable.
2 Tripod serial numbers for this modification are as follows, but customers should be aware that earlier
tripods may be fitted with replacement legs of modified design.
Identification
3 Turn the clamp knob
4 Using a suitable instrument, such as a flat-bladed screwdriver, carefully remove the knob cap (1).
5 Remove the retaining screw
Unmodified clamps
6 Unmodified clamps may be identified by having one stop on the reverse and an M4 clearance hole.
They are secured using an M4 screw and washer.
Modified clamps
7 Modified clamps have two stops on the reverse and an M5 clearance hole. They are secured using an
M5 screw and washer.
Adjustment grubscrews
8 The design of the modified bottom clamp shaft changed during 2005. The adjustment and locking
grubscrews were replace by a single grubscrew retained by a locking thread insert.
9 Tripod serial numbers for this modification are as follows, but customers should be aware that earlier
tripods may be fitted with replacement legs of modified design.

Identifying modified bottom clamps

Tripod Type
75 mm Aluminium
75 mm Carbon fibre 3776-3
100 mm Aluminium
100 mm Carbon fibre 3772-3
100 mm Baby Legs
(4) counter-clockwise to the 'OFF' position.
(2) and washer (3), and pull off the clamp knob (4).
Part No. Serial No.
3774-3 01007
00337
3770-3 00758
00493
3778-3 00124
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