Hach DR300 Service Manual page 52

Repairs
Step Description
1 Open the instrument, refer to
2 Remove the defective battery contacts from the bottom
housing. If the battery contact LPZ445.99.00011 is defective,
replace the bottom housing. Refer to
on page 47.
3 Install in the 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.
4 To reassemble the instrument, install display, keypad, optical
unit and mainboard. Close the instrument.
Note: Coat the seal groove with Krytox oil.
Note: Make sure that the screws are tightened to 0.8 Nm.
50
• Krytox oil (item no. 16004801)
Open the instrument
Replace the housing
Picture
on page 35.