drago LEGACY Series User manual

CLINIC GUIDE

MODEL IDENTIFICATION
1Corn Head Clinic Guide –
Legacy, Series I & II
MODEL IDENTIFICATION
LEGACY –2001 to 2004
The Legacy model,the platform that both Series I & II are based on. It is easily identified by the red frame as well
as steel snouts and bonnets. This was the first model introduced to North America. The drive system on the Legacy
head is exclusively oil bath driven.
SERIES I –2005 to 2012
The Series I corn head is built on the Legacy platform,with a few changes. These changes include a dark gray
frame color,the introduction of poly snouts and bonnets (steel snouts were optional), and a folding head option
being offered (2012 models). The drive system on Series I heads were predominately oil bath drivenwith some
larger models utilizing the heavy-duty gearbox drive. They are identified by the decal on the end of the head that
shows “DRAGO BY OLIMAC”
SERIES II –2013 to Current
The Series II corn head is built on the Legacy & Series I platform. The major changesfrom Series I to Series II
included updated poly snouts and bonnets (steel snouts were an option), the drive systems are oil bath drive
chains for heads smaller than 12 rows & heavy-duty gearbox drive for all heads 12 rows and larger. They are
identified by the decal on the end of the head that shows “DRAGO BY OLIMAC SERIES II”

INTRODUCTION
Corn Head Clinic Guide – Legacy, Series I & II 2
Table of Contents
MODEL IDENTIFICATION ......................................................................................................................................... 1
MAINTENANCE ............................................................................................................................................................3
REQUIRED FLUIDS ..................................................................................................................................................... 4
LUBRICANT PART NUMBERS ..................................................................................................................................... 4
MAINTENANCE SCHEDULE ........................................................................................................................................ 5
PRE-SEASON ........................................................................................................................................................... 5
NORMAL OPERATION ............................................................................................................................................. 5
DOWN CORN ........................................................................................................................................................... 6
PRE-SEASON ............................................................................................................................................................... 7
20 HOUR ..................................................................................................................................................................... 8
50 HOUR ..................................................................................................................................................................... 8
100 HOUR ................................................................................................................................................................. 10
250 HOUR OR YEARLY ............................................................................................................................................. 10
INITIAL SETTINGS...................................................................................................................................................12
CORN HEAD ANGLE ...................................................................................................................................... 12
HEAD SPEED ................................................................................................................................................ 13
SNOUT ADJUSTMENTS ................................................................................................................................. 14
DECK PLATE GAP ......................................................................................................................................... 14
DECK PLATE TENSION ................................................................................................................................. 15
GATHERING CHAIN TENSION ...................................................................................................................... 15
PART REPLACEMENT .............................................................................................................................................. 16
PERFORMANCE PARTS........................................................................................................................................... 19
TROUBLESHOOTING................................................................................................................................................20
SERVICE VIDEOS ..................................................................................................................................................... 23

MAINTENANCE
3Corn Head Clinic Guide –
Legacy, Series I & II
MAINTENANCE
Themaintenance items in this section outlines the recommended intervals and lubricants required to keep the
corn head functioning properly.
For more information on maintenance items and repairs please refer to your Operators Manual or the Drago
Service Video website at https://www.dragotec.com/service-video
It is important to use only the lubricants specified or degradation of corn head performance may appear over
time. Unlike most other EP0 greases, Mobilux EP0 grease does not use clay or polymers as the base material.
When clay-based greases are used over time the grease evaporates and leaves behind the base material. This base
material deposit can build up over time preventing normal operation. This is the common cause of deck plates and
gathering chain tensioners to stick. The pictures below show what the base material deposits look like.

MAINTENANCE
Corn Head Clinic Guide – Legacy, Series I & II 4
REQUIRED FLUIDS
Mobilux EP 1 grease is recommended for heads running in sustained ambient temperatures of 100°F (38°C) or higher.
LUBRICANT PART NUMBERS
LUBRICANT LOCATION CAPACITY
SAE 30W Oil
Mobilux EP 0 Grease
Mobil SHC 634 Synthetic Oil
Gathering Chain
Stalk Rollers
Gathering Chain Tensioner
Gathering Chain Drive Sprocket
Folding Joints
Tow Shaft Bearings
Deck Plate Tension Piston
PTO Drive Shafts
Row Unit Slip Clutch
Row Unit Gearbox (Non-Chopping)
Row Unit Gearbox (Chopping)
Input Shaft Bearing
Transfer Gearbox
Oil Bath
Heavy-Duty Drive Gearbox
—
—
—
—
—
—
—
—
—
135 oz. (4.0L)
152 oz. (4.5L)
—
15 oz. (450mL)
57 oz. (1.7L)
118 oz. (3.5L)
LUBRICANT SIZE PART NUMBER
Mobilux EP 0 Grease 14 oz. (414 mL) Tube –Case of 10
5 Gallon Bucket (19L)
GT-1000T
DR-MOB-EPO
Mobilux EP 1 Grease 5 Gallon Bucket DR-MOB-EP1
Mobil SHC 634 Synthetic Oil 1 Quart (0.9L) –Single
Case of 12 Quarts
DR-MOB634-QT
DR-MOB634-CASE
5 Gallon Bucket Pump —5GAL-PUMP-#321

MAINTENANCE
5Corn Head Clinic Guide –
Legacy, Series I & II
MAINTANCE SCHED ULE
PRE-SEASON
NORMAL OPERATION
CHECK
ADJUST
LUBRICATE -Gathering Chain Tensioner
-Stalk Rollers
-Gathering Chain Tension
-Purge Deck Plate Piston
-Cross-Auger Drive Chain Tension
-Heavy-Duty Gearbox Oil Level
-Oil Bath Case Oil Level
-Row Unit Gearbox Grease Level
-Transfer Gearbox Oil Level
-Deck Plate Gap
EVERY 20 HOURS
LUBRICATE
-Stalk Rollers
EVERY 50 HOURS
CHECK
-Heavy-Duty Gearbox Oil Level
-Oil Bath Case Oil Level
-Row Unit Gearbox Grease Level
-Transfer Gearbox Oil Level
-Gathering Chain Tension
LUBRICATE
-Cross-Auger Drive Chain
-Gathering Chain Drive Sprocket
-Row Unit Slip Clutch
-Input Shaft Bearings
-PTO Shaft U-Joints
-PTO Shaft Shield Bearings
EVERY 100 HOURS
ADJUST -Oil Bath Drive Chain Tension
-Cross-Auger Drive Chain Tension
LUBRICATE -Gathering Chain Tensioner
EVERY 250 HOURS OR ANNUALLY
CHECK
ADJUST
-Inspect Gathering Chain Guides
-Gathering Chain Tension
LUBRICATE
-Deck Plate Pistons
-Inner Folding Pin
-Outer Folding Pin
-Wing Pin
-Locking Piston
-Inner Tow Shaft Bearing
-Outer Tow Shaft Bearing
IF PERFORMING ANNUAL MAINTENANCE COMPLETE THE 20, 50,AND 100 HOUR SERVICES IN
ADDITION TO THE 250 HOUR SERVICE
CHECK
-Inspect Stalk Chopper (if equipped)

MAINTENANCE
Corn Head Clinic Guide – Legacy, Series I & II 6
DOWN CORN
DAILY
LUBRICATE
-Stalk Rollers
EVERY 20 HOURS
CHECK
-Gathering Chain Tension
LUBRICATE
-Oil Bath Drive Chain Tension
-Gathering Chain Tensioner
EVERY 50 HOURS
ADJUST
-Heavy-Duty Gearbox Oil Level
-Oil Bath Case Oil Level
-Row Unit Gearbox Grease Level
-Transfer Gearbox Oil Level
LUBRICATE
-Cross-Auger Drive Chain
-Gathering Chain Drive Sprocket
-Row Unit Slip Clutch
-Input Shaft Bearings
-PTO Shaft U-Joints
-PTO Shaft Shield Bearings
EVERY 100 HOURS
CHECK
ADJUST
-Inspect Gathering Chain Guides
-Gathering Chain Tension
LUBRICATE
-Deck Plate Pistons
-Inner Folding Pin
-Outer Folding Pin
-Wing Pin
-Locking Piston
-Inner Tow Shaft Bearing
-Outer Tow Shaft Bearing
IF PERFORMING YEARLY MAINTENANCE COMPLETE THE 20, 50, AND 100 HOUR SERVICES IN
ADDITION TO THE 250 HOUR SERVICE
ADJUST
ADJUST
EVERY 250 HOURS OR YEARLY
-Cross-Auger Drive Chain Tension

MAINTENANCE
7Corn Head Clinic Guide –
Legacy, Series I & II
PRE-SEASON
①Check Heavy-Duty Gearbox Oil
② Check Oil Bath Oil Level
③ Check Row Unit Gearbox Grease
④Check Transfer Gearbox Oil
⑤Check Deck Plate Gap
⑥Adjust Gathering Chain Tension
⑦Purge Deck Plate Piston
⑧Adjust Cross-Auger Chain
⑨Grease Gathering Chain

MAINTENANCE
Corn Head Clinic Guide – Legacy, Series I & II 8
PRE-SEASON (Cont.)
20-HOUR
50-HOUR
⑩Grease Stalk Rollers
①Grease Stalk Rollers
②Inspect Stalk Chopper
①Check Heavy-Duty Gearbox Oil
②Check Oil Bath Oil
③Check Row Unit Gearbox Grease

MAINTENANCE
9Corn Head Clinic Guide –
Legacy, Series I & II
50-HOUR (Cont.)
④Check Transfer Gearbox Oil
⑤ Check Gathering Chain Tension
⑥ Lube Cross-Auger Chain
⑦Grease Gathering Chain Drive
⑧Grease Row Unit Slip Clutch
⑨Grease Input Bearing
⑩Grease PTO Shield Bearing
⑪Grease PTO U-Joint

MAINTENANCE
Corn Head Clinic Guide – Legacy, Series I & II 10
100-HOUR
250 HOUR OR YEARLY
If performing year end service complete the 20, 50,and 100-hour services in addition to the 250 hour service
below.
①Tension Oil Bath Chain
②Grease Gathering Chain Tensioner
③Tension Cross-Auger Chain
①Inspect Gathering Chain Guides
②Grease Deck Plate Piston
③Grease Inner Folding Joints

MAINTENANCE
11 Corn Head Clinic Guide –
Legacy, Series I & II
250 HOUR OR YEARLY (Cont.)
④ Grease Locking Piston
⑤ Grease Inner Tow Shaft Bering
⑥ Grease Outer Tow Shaft Bearing
⑦ Grease PTO Shaft Profile

INITIAL SETTINGS
Corn Head Clinic Guide – Legacy, Series I & II 12
INITIAL SETTINGS
The settings listed in this section are the suggested settings to be used when starting each harvest season.
Adjustments can then be made to best suit the conditions being operated in. The head angle and head speed are
the most critical to maintaining performance of the corn head. Before going to the field each year all settings
shown should be checked to verify that the head is set properly.
CORN HEAD ANGLE
The corn head angle is measured from the deck plates and should be
between 17°and 23°
-For normal operation the recommended setting is 20°
-For down corn the recommended setting is 23°
To check the head angle, park the combine with the corn head attached,
on a flat, level surface,and place the corn head in operating position.
Place an angle finder on the deck plates to check the angle.
Whenever the corn head angle is adjusted the snout angle should be
adjusted as well.
See Section 6.1 in the Operators Manual for further information.

INITIAL SETTINGS
13
Corn Head Clinic Guide –
Legacy, Series I & II
HEAD SPEED
Excessive butt shelling and poor feeding can occur from the head being operated either TOO FAST or TOO
SLOW. The speed that the corn head operates is critical to maintain proper performance with the Drago corn
head. Any time the head is adapted to fit a different combine the gearing should be checked to verify it is
correct. Contact your dealer to determine the correct gearing for your combine. Depending on the size and age
of the corn head, one of two different drive systems shown below may be used. The oil bath drive system uses
two sprockets and roller chain to drive the head. The heavy-duty gear drive uses a gearbox with interchangeable
gears.
The corn head should be operated in the 630-700rpm range. Recommended speed is 650-675rpm. Use the
formula below to determine the correct combine feeder house speed for the desired head speed.
Please note that some combines do not display the actual feeder output speed in the cab. If this is encountered
the best practice is to use a hand tachometer on the output shaft of the feeder house.
  =       
   
Example:
A Gleaner S88 combine with a variable speed feeder house drive with an 8-row head. The monitor in the cab is
showing 510 rpm feeder speed.
-This model of combine requires a 1.5 multiplier be added to the in-cab feeder speed reading due to
reading the feeder speed being monitored at a different point in the system.
o  =510  1.5
oActual feeder speed for this example is 765 rpm.
-Determine which driveR and driveN sprockets or gears are currently installed on the corn head.
oThe driven gear on the heavy-duty gear drive is always 32-tooth. Only the driveR gear is
changed.
oFor this example,the driveR is a 22-tooth sprocket and the driveN is a 26-tooth sprocket.
o
  =
765   22 ℎ
26 ℎ
This works out to 647rpm head speed.
OIL BATH
HEAVY-DUTY GEAR DRIVE

INITIAL SETTINGS
Corn Head Clinic Guide – Legacy, Series I & II 14
SNOUT ADJUSTMENTS
When positioning the snouts,do not place them below the breakover line. This line extends from the bottom
surface of the bonnet forward toward the wear point. If the snouts are below this point and an obstacle is
encountered, they will be more likely to fold under the corn head instead of floating over top of the obstacle.
See Section 6.2 in the Operators Manual for specific adjustment procedures.
DECK PLATE GAP
Check the deck plate gap using tool ST-8, which is available from your
local Drago dealer. Place the tool where the curved portion of the deck
plate stops.
-Insert the tool until the tab marked “MIN_F” is between the deck
plates. The deck plates should not move,or,move very slightly
when the tool is inserted.
-Insert the tool to the tab marked “MAX_F” is between the deck
plates. The deck plates should spread to the maximum setting
and should not be able to be opened further.
If adjustment is required see Section 6.6 in the Operators Manual.
Correct
Incorrect

INITIAL SETTINGS
15
Corn Head Clinic Guide –
Legacy, Series I & II
DECK PLATE TENSION
For 30”-40” row heads measure the exposed threads on the deck plate
piston bolt. The distance from the jamb nut and the bottom of the
adjustment bolt head should be 14mm (9/16”). There is no adjustment
mechanism for 20”-22” row pistons.
If adjustment is required see Section 6.6 in the Operators Manual.
GATHERING CHAIN TENSION
Check the gathering chain tension by pulling on the side of the gathering
chain until the tensioning fork hits the internal stop. Mark the tensioning
fork shaft and release the chain. The tensioning fork should have 1/4" to
5/16“of travel.
If adjustment is required see Section 6.7in the Operators Manual.

PART REPLACEMENT
Corn Head Clinic Guide – Legacy, Series I & II 16
PART REPLACEMENT
The information below is intended to help evaluate when certain wear parts are nearing the end of their
intended lifespan. Dragotec recommends only original OLIMAC wear parts be used. Use of third-party parts may
void warranties and are not as long-lasting.
Stalk Roller Knives
The stalk roller knives are due to be replaced when visible wear is seen on the front edge of the knife blade,
approximately 5-6 inches back. The front edge of the roller knives should be inspected to see if wear has
progressed past the tungsten coated edge.
It is not recommended to flip the stalk roller knives. This may cause material to wrap around the rear of the stalk
roller causing damage to the stalk roller seal.
Visible
Wear Limit
Tungsten
Edge Wear

PART REPLACEMENT
17
Corn Head Clinic Guide –
Legacy, Series I & II
Gathering Chains
The gathering chains should be replaced when they reach 3% stretch. Continuing to run past this point can cause
the chains to break and potentially enter the combine. Measure from the amount of exposed tensioner tube
(highlighted area). This dimension should be 25/8” or less.
Deck Plates
The deck plates can become worn over time causing material to hairpin on sharp edges impeding feeding. The
wear is typically concentrated on the vertical edge that contacts the crop on the front curve (highlighted area).
When this vertical edge becomes thin the deck plates should be replaced.
Wear
Location
2 5/
8
”

PART REPLACEMENT
Corn Head Clinic Guide – Legacy, Series I & II 18
Cross-Auger Drive Chain & Tensioner Roller
The cross-auger tensioner roller will become worn due to the chain riding on the smooth surface. The tensioner
roller should be replaced when the rollers on the drive chain begin to touch the roller surface. This will result
small dimples appearing on the center of the roller (highlighted area).
The cross-auger drive chain should be replaced when 3% stretch is reached. The drive chain has reached this
point when the half link has been removed from the chain and the tensioner is positioned near the front of the
slot when the chain is properly tensioned as shown below.
To ensure proper performance ensure that the tensioner assembly (triangular bracket) can pivot freely without
binding on the side sheet of the frame.
Dimple
Location
Tensioner at
Front of Slot

PERFORMANCE PARTS
19
Corn Head Clinic Guide –
Legacy, Series I & II
PERFORMANCE PARTS
Drago offers several different product performance parts and accessories for different conditions. The two
shown below are considered to provide the best performance increase across the widest range of conditions.
SNOUT WEAR POINTS
In 2018,Drago introduced a new standard poly wear point for Series II corn heads with a new front profile.
-The standard wear point has a shorter, less aggressive profile,with a higher tip point to help reduce the
risk of folding the snouts under.
-The aggressive wear point has a pointed tip that sits low to the ground and is recommended for severe
down corn conditions where the wear point tries to ride up over the corn.
The picture below shows the difference in the wear points. The yellow is the aggressive wear point, and the
green is the standard wear point.
AGGRESSIVE FEEDING BLOCKS
Drago offers an aggressive feeding block that will fit all Legacy, Series I,and Series II corn heads. This block
(bottom block) is thicker than the production wear pad (top block). The thicker block pushes the gathering
chains closer together at the top of the row unit to allow the gathering chains to maintain more positive control
of the ears before entering the cross-auger. The aggressive feeding blocks replace the rear most gathering chain
wear pad. Each row requires two feeding blocks to complete.
Block
Location