Perkins 4.108 Workshop Manual page 14

TECHNICAL DATA-B.4
Piston Rings 4.108
Top-Compression
Second and Third Compression
Fourth-Oil Control
Fifth-Oil Control
Top Compression Ring Width
Ring Clearance in Grove ...
Second and Third Compression Ring Width
Ring Clearance in Groove
Fifth Scraper Ring Width ...
Ring Clearance in Groove
Ring Gap-Top Compression
Ring Gap-Second and Third Compression .
Ring Gap-Fifth Scraper ...
Parallel Faced
Internally Stepped
Laminated Segment
'*
Slotted Scraper
0.0771/0.0781 in (1,958/1,984 mm)
0.0024/0.0044 in (0,061/0,112 mm)
0.0615/0.0625 in (1,562/1,587 mm)
0.00210.004 in (0,051/0,102 mm)
0.1865/0.1875 in (4,737/4,762 mm)
0.0025/0.0045 in (0,063/0,114 mm)
0.00910.017 in (0,229/0,432 mm)
0.00910.017 in (0,229/0,432 mm)
0.00910.017 in (0,229/0,432 mm)
:*
Engines rated at 3,000 revlmin and below have a slotted scraper fitted in the fourth groove which has the same
I
width, clearance and gap as the fifth ring.
: Piston Rings 4.108(Controlied Expansion - Four Ring)
, Top Compression
I Second and Third Compression
I
Fourth Oil Control
I
Top Compression Ring Width
I
Ring Clearance in Groove ...
: Second and Third Compression Ring Width
Ring Clearance in Groove
I
Oil Control Ring Width ...
I
Ring Clearance in Groove
J
Ring Gap, Top ... . ..
I
Ring Gap, Second and Third
I
Ring Gap, Oil Control
Chrome Insert - Parallel Faced
Internally Stepped
Spring Loaded Scraper
0.077/0.078 in (1,96/1,98 mm)
0.002/0.005 in (0,05/0,13 mm)
0.0615/0.0625 in (1,5611,59 mm)
0.0015/0.0035 in (0,0410,09 mm)
0.186/0.1865 in (4,72/4,74 mm)
0.0022/0.0035 in (0,0510.09 mm)
0.012/0.023 in (0,30/0,58 mm)
0.009/0.020 in (0,23/0,50 mm)
0.010/0.021 in (0,25/0,53 mm)
: Piston Rings 4.108 (Controlled Expansion - Three Ring)
I
Top Compression
: Second Compression
I
Third Oil Control
I
Top Compression Ring Width
I
Clearance in Groove ...
: Second Compression Ring Width
I
Clearance in Groove
I Oil Control Ring Width
: Clearance in Groove
I Ring Gap, Top ...
I
Ring Gap, Second
I Ring Gap, Oil Control
Piston Rings
4.99 Vehicle
Top Compression
Second and Third Compression
Fourth and Fifth Oil Control
Piston Rings 4.107 and 4.99
and Industrial
Top Compression
'Second and Third Compression
Fourth-Oil Control
Fifth-Oil Control
Chrome, Taper Faced
Internally Stepped, Taper Faced
Spring Loaded Scraper
0.0765/0.0775 in (1,943/1,969 mm)
0.0025/0.0055 in (0,063/0,140 mm)
0.097/0.098 in (2,46/2,49 mm)
0.0015/0.0035 in (0,039/0,089 mm)
0.1865/0.1875 in (4,737/4,763 mm)
0.0015/0.0035 in (0,039/0,089 mm
0.01210.023 in (0,31/0,59 mm)
0.009/0.020 in (0,23/0,51 mm
0.012/0.023 in (0,31/0,59 mm
Parallel Faced Chrome Plated
Internally Stepped
Slotted Scraper
Parellel Cast Iron
Internally Stepped
Chrome Plated Spring Loaded Scraper
Slotted Scraper
• 4.99 Agricultural engines have taper faced cast iron compression rings fitted in the second and third ring grooves.
Top Compression Ring Width
Ring Clearance in Groove
Second and Third Compression Ring Width.
Ring Clearance in Groove
Fourth and Fifth Scraper Ring Width
Ring Clearance in Groove
Ring Gap-Compression Rings Chrome Vehicle
Ring Gap-Oil Control Rings Cast Iron Vehicle
Ring Gap-Compression Rings Cast Iron
Agricultural and Industrial
0.0771/0.0781 in (1,96/1,984 mm)
0.002/0.004 in (0,051/0,102 mm)
0.0615/0.0625 in (1,562/1,587 mm)
0.00210.004 in (0,051/0,102 mm)
0.1865/0.1875 in (4,73714,762 mm)
0.0025/0.0045 in (0,064/0.114 mm)
0.01210.020 in (0,30/0,50 mm)
0.009/0.017 in (0,30/0,432 mm)
0.009/0.017 in (0,30/0,432 mm)