JLG 450A_AJ Series II Service Manual - Manual (Page 241)

SECTION 5 - HYDRAULICS
3121290 – JLG Lift – 5-1
SECTION 5. HYDRAULICS
5.1 O-RING LUBRICATION
All fittings with O-rings must be lubricated with hydraulic oil
before assembly using one of the following four methods:
• Cup and Brush
• Dip
• Spray
• Brush-On
Cup and Brush
Tools needed:
• Small container for hydraulic oil
• Small paint brush
1. Hold fitting in one hand and dip brush into container
with other hand. Remove excess hydraulic oil from
brush so an even film of oil is applied to O-ring.
2. Hold fitting over hydraulic oil container and brush an
even film of oil around entire O-ring in fitting. Make sure
O-ring is completely saturated.
3. Turn over fitting repeat previous step to O-ring on other
side of fitting. Make sure entire O-ring is coated with
hydraulic oil.