At a speed of 5500 min9 shaft imbalance controlled on surfaces A and B (pic. 3-56), must not exceed 1.72 N·mm (175 gf mm), and when checking the balancing - 2.16 N·mm (220 gf mm).
Pic. 3-56. Balancing cardan shafts: 1 - washers for balancing; A, B, E, F - unbalance control surfaces; C, D - bearing surfaces of the shaft on the balancing machine
The balancing of the intermediate cardan shaft is checked at a speed of 800 min-1 on surfaces E and F. Balancing is provided by balancing washers 1 (see fig. 3-56). Unbalance should not exceed 2.36 N·mm (240 gf mm).
Warning. If shaft parts were replaced during the repair, then the shafts must be balanced.
After balancing, lubricate the universal joint bearings with grease No. 158 or Fiol-2U through grease fittings. Pump the lubricant until it exits through the seals.