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SLN.300 Maintenance

Instructions

DADCO's SLN.RK.300 repair kit can be used to repair all SLN.300 Non-Rotating Nitrogen Gas

Lifters. SLN.300 Lifters manufactured after week 18 of 2007 (md1807) will have a new Piston,

Piston Rider and Cushion construction. The Piston, Piston Rider and Cushion retroﬁt into SLN.300

lifters manufactured before week 18 of 2007 (md1807). Please follow the instructions below in

conjunction with the SLN.300 Maintenance Instructions (B04110) for proper inspection, removal and

installation of the Piston, Piston Rider and Cushion. After reviewing this maintenance guide, if you

require any additional training or have any questions please contact DADCO for assistance.

CAUTION: Always wear safety goggles when performing any maintenance work.

Continued from DADCO's SLN.300 Maintenance Instructions

V. Cleaning & Inspection

3A. Inspect the Piston and Cushion

for damage or wear. If the Piston

or Cushion is damaged it must

be replaced. SLN.300 Lifters

manufactured after week 18

of 2007 (md1807) will have a

new Piston, Piston Rider and

Cushion. NOTE: The Piston, Piston

Rider and Cushion retrofit lifters

manufactured before week 18 of

2007 (md1807).

4. Remove the Rider from the Piston

and inspect. Clean the Piston.

Snap the new Rider onto the Piston,

set aside for reassembly. Return to

DADCO's SLN.300 Maintenance

Bulletin VII. Internal Rod Removal.

Use in conjunction with DADCO's SLN.300 Maintenance

Instructions (B04110)

VI. Piston and Cushion Removal

1. Remove the Retaining Ring

from the Piston using the Port

Servicing Tool's small ﬂat bit.

Continued from DADCO's SLN.300 Maintenance Instructions

VIII. Seal Kit Replacement and Reassembly

5A. Install the Cushion onto the

Guide Rod.

734.207.1100 • 800.DADCO.USA • f a x 734.207.2222 • www.dadco.net

2. Slide the Piston off the

Guide Rod. NOTE: If Piston

shows signs of damage it

must be replaced.

Chamfer

5B. Install the Piston onto the

Guide Rod with Piston chamfer

facing toward the cartridge.

3. Slide the Cushion off

the Guide Rod. NOTE: If

Cushion shows signs of

damage it must be replaced.

6. Install the new Retaining

Ring by pressing into place

with the Port Servicing Tool's

small ﬂat bit. The Retaining

Ring must be completely

seated in the square groove.

Return to DADCO's SLN.300

M a i n t e n a n c e B u l l e t i n

VIII. Seal Kit Replacement

and Reassembly, step 7.