BLACKMER SNP1.25, Installation, Operation And Maintenance Instructions

104-A00    Page 10/16 

MAINTENANCE 

Figure 7a – Sleeve Bearing Alignment

Figure 7b – Sleeve Bearing Installation 

4. 

SLEEVE BEARINGS (Bushings)

If the sleeve bearing has been removed from the head, a new 
bearing must be installed. 

a.  To aid installation, heat the head in an oven at 

200°F (93°C) before installing the bearing. 

b.  Coat the new bearing with a quality grade of bearing 

grease, and place it on the inside face of the head 
with the notched end UP. 

Align the notch in the 

bearing with the groove in the head

.  See figure 

7a. 

c. 

Using an arbor press, press the bearing into the 
head in one continuous motion, until it is flush with 
(or slightly below) the inside face of the head. 
Starting and stopping the pressing motion may 
result in a cracked bearing. 

d.  Ensure that the  hole in the face of the head is open 

after inserting the bushing.  See figure 7a. 

5. 

CYLINDER BORE

Examine the cylinder bore carefully for tiny ‘pin head’ 
projections caused by foreign material in some fluids.  
Carefully scrape off the small projections and smooth the 
bore with emery as needed.