Hydraulics; Crane Base: Checking The Oil Level/Oil Change; Bleeding Air From The Hydraulic System - Jonsered 1188S CE Operator's Manual

12.8. Hydraulics

12.8.1. Crane base: checking the oil level/oil change

Checking the oil level in the crane base
1. The oil level must reach the bottom edge of the top oil
level eye. the crane slewing system and the lower
bearing of the column must be fully submerged in oil
bath.
2. If the oil level is below the minimum level, top up
through the filling hole with transmission oil of type MIL-
L-2105C or API-GL-5, viscosity SAE-80W-90
Changing oil in the slewing housing
Change the oil in the slewing house yearly!
1. Use a container with sufficient capacity to receive the oil. Drain off the oil through the drain
plug.
2. Refill through the hole for the measuring stick, with transmission oil of type MIL-L-2105C or
API-GL-5, viscosity SAE-80W-90.
3. Slew the crane, after filling to the end positions, three times.
4. Check the oil level. If necessary top up again.

12.8.2. Bleeding air from the hydraulic system

Bleed the air from the hydraulic system:
• after changing the hydraulic oil
• after working on the hydraulic system
• if your crane works slowly or jerkily
WARNING
Air in the hydraulic system can lead to faults and damage
To bleed air from the hydraulic system, proceed as follows:
Move each crane cylinder and each hydraulically operated piece of add-on equipment at least
twice to its end positions (slowly).
Maintenance and Service
Jonsered 1188S CE 83