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Engine Tools
Cylinder Block and Liners
9U-7988 Riser Plate Group
Model: 3300 Engines with Spacer Plate
Warranty: Six Months
• Usedduringsalvageoperationof
liner seats which are cracked or
damaged
• Used with 9U-7990 Counterbore
Tool Group, 9U-7989 Cutter Plate or
9U-7961 Cutter Plate, and 9U-7992
Cutter Bit
• Eliminatesneedtoremoveadja-
cent cylinder liners during rework
procedure
Reference
NEHS0612, Tool Operating Manual
Part Number Description
9U-7988 Riser Plate Group
9U-7990 Counterbore Tool Group
Model: 3176, 3300 (with spacer plate), and 3406 (with spacer plate) Engines
Warranty: Six Months
• Used to machine engine block liner seats which are cracked or damaged
• Usedwithheavydutyelectricdrill(5/8or3/4inch,300to600RPM,8ampsor
more), 9U-7988 Riser Plate Group (3300 Engine), 9U-7993 Depth Gauge Assembly
• Avarietyofinsertthicknessesareavailabledependingondepthofcut
• Cutter plate is tapered — helps center counterbore tooling in cylinder bore
• Eachcounterboreoperationrequiresaspeciccutterbitandcutterplate(see
chartforspecictoolingandinsertpartnumber)n>-3176and3300Enginesuse
9U-7989CutterPlateand9U-7992CutterBitn>-3406Enginesuse9U-7991Cutter
Plate and 6V-6191 Cutter Bit
• Willnott3408or3412Engines
Reference
NEHS0612, Tool Operating Manual
Item Part Number Description Model
-- 9U-7990 Counterbore Tool Group --
Typical Examples
1 9U-7989 Cutter Plate 3176 and 3300 Engines
1 9U-7991 Cutter Plate 3406 Engines
2 9U-7992 Cutter Bit 3176 and 3300 Engines
2 6V-6191 Cutter Bit 3406 Engines