Hach DR300 Service Manual page 50

Repairs
Step Description
1 Open the instrument, refer to
2 Install in a new bottom housing new battery contacts.
Note: Push down the battery contact springs with blade of a screw
driver.
Note: First stick the contacts to the slot in the plastic part. Make sure
that the contacts are placed in correct direction. Push in the battery
contacts. The battery contacts click in the correct position.
3
• Stick the foam load disk (self-adhesive) on the marked
area in the bottom housing.
• Stick the type label of the instrument, including part
numer and serial number to the outside of the bottom
housing.
48
• Krytox oil (item no. 16004801)
Open the instrument
Picture
on page 35.